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2023-02-18runtime/cgo: restore correct build tags for linux/mips*Joel Sing
The linux build tags were incorrectly removed from these files by CL 460538. Restore the correct build tags so that they are only included in builds for linux/mips* platforms. Change-Id: I21d8802b0252688d8e2228cf904b47d90b253485 Reviewed-on: https://go-review.googlesource.com/c/go/+/469175 Reviewed-by: Cherry Mui <cherryyz@google.com> Run-TryBot: Joel Sing <joel@sing.id.au> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com>
2023-02-17cmd/compile: move raw writes out of write barrier codeKeith Randall
Previously, the write barrier calls themselves did the actual writes to memory. Instead, move those writes out to a common location that both the wb-enabled and wb-disabled code paths share. This enables us to optimize the write barrier path without having to worry about performing the actual writes. Change-Id: Ia71ab651908ec124cc33141afb52e4ca19733ac6 Reviewed-on: https://go-review.googlesource.com/c/go/+/447780 Reviewed-by: Michael Knyszek <mknyszek@google.com> TryBot-Bypass: Keith Randall <khr@golang.org> Run-TryBot: Keith Randall <khr@golang.org> Reviewed-by: Cherry Mui <cherryyz@google.com>
2023-02-17runtime: remove the restriction that write barrier ptrs come in pairsKeith Randall
Future CLs will remove the invariant that pointers are always put in the write barrier in pairs. The behavior of the assembly code changes a bit, where instead of writing the pointers unconditionally and then checking for overflow, check for overflow first and then write the pointers. Also changed the write barrier flush function to not take the src/dst as arguments. Change-Id: I2ef708038367b7b82ea67cbaf505a1d5904c775c Reviewed-on: https://go-review.googlesource.com/c/go/+/447779 Run-TryBot: Keith Randall <khr@golang.org> Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Michael Knyszek <mknyszek@google.com> TryBot-Bypass: Keith Randall <khr@golang.org>
2023-02-16runtime: expose auxv for use by x/sys/cpuBrad Fitzpatrick
Updates #57336 Change-Id: I181885f59bac59360b855d3990326ea2b268bd28 Reviewed-on: https://go-review.googlesource.com/c/go/+/458256 Reviewed-by: Michael Pratt <mpratt@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Auto-Submit: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by: Austin Clements <austin@google.com> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
2023-02-16runtime: reimplement GODEBUG=cgocheck=2 as a GOEXPERIMENTKeith Randall
Move this knob from a binary-startup thing to a build-time thing. This will enable followon optmizations to the write barrier. Change-Id: Ic3323348621c76a7dc390c09ff55016b19c43018 Reviewed-on: https://go-review.googlesource.com/c/go/+/447778 Reviewed-by: Michael Knyszek <mknyszek@google.com> Run-TryBot: Keith Randall <khr@golang.org> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Cherry Mui <cherryyz@google.com>
2023-02-14runtime: check for overflow in sweep assistMichael Anthony Knyszek
The sweep assist computation is intentionally racy for performance, since the specifics of sweep assist aren't super sensitive to error. However, if overflow occurs when computing the live heap delta, we can end up with a massive sweep target that causes the sweep assist to sweep until sweep termination, causing severe latency issues. In fact, because heapLive doesn't always increase monotonically then anything that flushes mcaches will cause _all_ allocating goroutines to inevitably get stuck in sweeping. Consider the following scenario: 1. SetGCPercent is called, updating sweepHeapLiveBasis to heapLive. 2. Very shortly after, ReadMemStats is called, flushing mcaches and decreasing heapLive below the value sweepHeapLiveBasis was set to. 3. Every allocating goroutine goes to refill its mcache, calls into deductSweepCredit for sweep assist, and gets stuck sweeping until the sweep phase ends. Fix this by just checking for overflow in the delta live heap calculation and if it would overflow, pick a small delta live heap. This probably means that no sweeping will happen at all, but that's OK. This is a transient state and the runtime will recover as soon as heapLive increases again. Note that deductSweepCredit doesn't check overflow on other operations but that's OK: those operations are signed and extremely unlikely to overflow. The subtraction targeted by this CL is only a problem because it's unsigned. An alternative fix would be to make the operation signed, but being explicit about the overflow situation seems worthwhile. Fixes #57523. Change-Id: Ib18f71f53468e913548aac6e5358830c72ef0215 Reviewed-on: https://go-review.googlesource.com/c/go/+/460376 Auto-Submit: Michael Knyszek <mknyszek@google.com> Reviewed-by: Michael Pratt <mpratt@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Michael Knyszek <mknyszek@google.com>
2023-02-11runtime: Allow handling of EXCEPTION_IN_PAGE_ERRORMax Altgelt
Currently, access faults on memory mapped files on Windows (e.g. from the drive the memory mapped file is on being ejected) cause a runtime fault that can not be caught by debug.SetPanicOnFault. On Unix systems, on the other hand, this causes a SIGBUS signal, which can be caught by debug.SetPanicOnFault. Given that the documentation of debug.SetPanicOnFault mentions handling memory mapped files, this is arguably the correct behaviour. Add handling, analogous to SIGBUS, to EXCEPTION_IN_PAGE_ERROR on Windows, to allow for users to handle this error. Fixes #58457 Change-Id: Ic7695fc01271f3552782089ac75c403d5279811f Reviewed-on: https://go-review.googlesource.com/c/go/+/467195 Reviewed-by: David Chase <drchase@google.com> Reviewed-by: Quim Muntal <quimmuntal@gmail.com> Run-TryBot: David Chase <drchase@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Russ Cox <rsc@golang.org> Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
2023-02-10runtime: skip darwin osinit_hack on iosRuss Cox
Darwin needs the osinit_hack call to fix some bugs in the Apple libc that surface when Go programs call exec. On iOS, the functions that osinit_hack uses are not available, so signing fails. But on iOS exec is also unavailable, so the hack is not needed. Disable it there, which makes signing work again. Fixes #58323. Change-Id: I3f1472f852bb36c06854fe1f14aa27ad450c5945 Reviewed-on: https://go-review.googlesource.com/c/go/+/466516 Run-TryBot: Russ Cox <rsc@golang.org> Reviewed-by: Dave Anderson <danderson@tailscale.com> Reviewed-by: Michael Knyszek <mknyszek@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Auto-Submit: Russ Cox <rsc@golang.org> Reviewed-by: Bryan Mills <bcmills@google.com> Reviewed-by: Than McIntosh <thanm@google.com>
2023-02-10cmd/cgo: add -fno-stack-protector to CFLAGS (again)Than McIntosh
Add -fno-stack-protector back to the default set of CFLAGS for cgo, so as to avoid problems with internal linking locating the library containing the "__stack_chk_fail_local" support function that some compilers emit (the specific archive can vary based on GOOS). Updates #52919. Updates #54313. Updates #57261. Updates #58385. Change-Id: I4591bfb15501f04b7afe1fcd50c4fb93c86db63d Reviewed-on: https://go-review.googlesource.com/c/go/+/466935 Reviewed-by: Ian Lance Taylor <iant@google.com> Run-TryBot: Than McIntosh <thanm@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
2023-02-09runtime: skip trailing wrappers in runtime_expandFinalInlineFrameTolyan Korniltsev
The existing runtime_expandFinalInlineFrame implementation doesn't skip trailing wrappers, but gentraceback does skip wrapper functions. This change makes runtime_expandFinalInlineFrame handling wrapper functions consistent to gentraceback. Fixes #58288 Change-Id: I1b0e2c10b0a89bcb1e787b98d27730cb40a34406 Reviewed-on: https://go-review.googlesource.com/c/go/+/465097 Reviewed-by: Michael Pratt <mpratt@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Auto-Submit: Michael Pratt <mpratt@google.com> Run-TryBot: Michael Pratt <mpratt@google.com> Reviewed-by: David Chase <drchase@google.com>
2023-02-08runtime: correct typosOleksandr Redko
- Fix typo in throw error message for arena. - Correct typos in assembly and Go comments. - Fix log message in TestTraceCPUProfile. Change-Id: I874c9e8cd46394448b6717bc6021aa3ecf319d16 GitHub-Last-Rev: d27fad4d3cea81cc7a4ca6917985bcf5fa49b0e0 GitHub-Pull-Request: golang/go#58375 Reviewed-on: https://go-review.googlesource.com/c/go/+/465975 Reviewed-by: David Chase <drchase@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com> Run-TryBot: Ian Lance Taylor <iant@google.com> Auto-Submit: Ian Lance Taylor <iant@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
2023-02-08runtime/internal/sys: remove Bswap{32|64} assembly for 386Wayne Zuo
CL 465515 instrinsify these functions, so that we can remove them. Change-Id: I81c9eb62ecf56d5a292dc5aced542b36b53847dc Reviewed-on: https://go-review.googlesource.com/c/go/+/465516 Reviewed-by: Keith Randall <khr@golang.org> Run-TryBot: Wayne Zuo <wdvxdr@golangcn.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com> Reviewed-by: Keith Randall <khr@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
2023-02-07runtime: use explicit NOFRAME on darwin/amd64qmuntal
This CL marks some darwin assembly functions as NOFRAME to avoid relying on the implicit amd64 NOFRAME heuristic, where NOSPLIT functions without stack were also marked as NOFRAME. This is a second attempt after CL 460235 was reverted. Change-Id: I790f2108fc01ec193aa32b0bc82362c2344a9f3b Reviewed-on: https://go-review.googlesource.com/c/go/+/466055 Run-TryBot: Quim Muntal <quimmuntal@gmail.com> Reviewed-by: Bryan Mills <bcmills@google.com> Reviewed-by: Keith Randall <khr@golang.org> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Keith Randall <khr@google.com>
2023-02-06runtime: fix cpu sample commentMaksim Meshkov
Fixes #58327 Change-Id: I15593e6ee42e04f2de13804ef26e0e66a2307db0 GitHub-Last-Rev: 7e0d04b503d2ba217b76b1ac668a67cd72ec6d7c GitHub-Pull-Request: golang/go#58338 Reviewed-on: https://go-review.googlesource.com/c/go/+/465335 Reviewed-by: Michael Knyszek <mknyszek@google.com> Run-TryBot: Michael Knyszek <mknyszek@google.com> Auto-Submit: Michael Knyszek <mknyszek@google.com> Reviewed-by: David Chase <drchase@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
2023-02-06cmd/link: linker portion of dead map removalThan McIntosh
This patch contains the linker changes needed to enable deadcoding of large unreferenced map variables, in combination with a previous compiler change. We add a new cleanup function that runs just after deadcode that looks for relocations in "init" funcs that are weak, of type R_CALL (and siblings), and are targeting an unreachable function. If we find such a relocation, after checking to make sure it targets a map.init.XXX helper, we redirect the relocation to a point to a no-op routine ("mapinitnoop") in the runtime. Compilebench results for this change: │ out.base.txt │ out.wrap.txt │ │ sec/op │ sec/op vs base │ Template 218.6m ± 2% 221.1m ± 1% ~ (p=0.129 n=39) Unicode 180.5m ± 1% 178.9m ± 1% -0.93% (p=0.006 n=39) GoTypes 1.162 ± 1% 1.156 ± 1% ~ (p=0.850 n=39) Compiler 143.6m ± 1% 142.6m ± 1% ~ (p=0.743 n=39) SSA 8.698 ± 1% 8.719 ± 1% ~ (p=0.145 n=39) Flate 142.6m ± 1% 143.9m ± 3% ~ (p=0.287 n=39) GoParser 247.7m ± 1% 248.8m ± 1% ~ (p=0.265 n=39) Reflect 588.0m ± 1% 590.4m ± 1% ~ (p=0.269 n=39) Tar 198.5m ± 1% 201.3m ± 1% +1.38% (p=0.005 n=39) XML 259.1m ± 1% 260.0m ± 1% ~ (p=0.376 n=39) LinkCompiler 746.8m ± 2% 747.8m ± 1% ~ (p=0.706 n=39) ExternalLinkCompiler 1.906 ± 0% 1.902 ± 1% ~ (p=0.207 n=40) LinkWithoutDebugCompiler 522.4m ± 21% 471.1m ± 1% -9.81% (p=0.000 n=40) StdCmd 21.32 ± 0% 21.39 ± 0% +0.32% (p=0.035 n=40) geomean 609.2m 606.0m -0.53% │ out.base.txt │ out.wrap.txt │ │ user-sec/op │ user-sec/op vs base │ Template 401.9m ± 3% 406.9m ± 2% ~ (p=0.291 n=39) Unicode 191.9m ± 6% 196.1m ± 3% ~ (p=0.052 n=39) GoTypes 3.967 ± 3% 4.056 ± 1% ~ (p=0.099 n=39) Compiler 171.1m ± 3% 173.4m ± 3% ~ (p=0.415 n=39) SSA 30.04 ± 4% 30.25 ± 4% ~ (p=0.106 n=39) Flate 246.3m ± 3% 248.9m ± 4% ~ (p=0.499 n=39) GoParser 518.7m ± 1% 520.6m ± 2% ~ (p=0.531 n=39) Reflect 1.670 ± 1% 1.656 ± 2% ~ (p=0.137 n=39) Tar 352.7m ± 2% 360.3m ± 2% ~ (p=0.117 n=39) XML 528.8m ± 2% 521.1m ± 2% ~ (p=0.296 n=39) LinkCompiler 1.128 ± 2% 1.140 ± 2% ~ (p=0.324 n=39) ExternalLinkCompiler 2.165 ± 2% 2.147 ± 2% ~ (p=0.537 n=40) LinkWithoutDebugCompiler 484.2m ± 4% 490.7m ± 3% ~ (p=0.897 n=40) geomean 818.5m 825.1m +0.80% │ out.base.txt │ out.wrap.txt │ │ text-bytes │ text-bytes vs base │ HelloSize 766.0Ki ± 0% 766.0Ki ± 0% ~ (p=1.000 n=40) ¹ CmdGoSize 10.02Mi ± 0% 10.02Mi ± 0% -0.03% (n=40) geomean 2.738Mi 2.738Mi -0.01% ¹ all samples are equal │ out.base.txt │ out.wrap.txt │ │ data-bytes │ data-bytes vs base │ HelloSize 14.17Ki ± 0% 14.17Ki ± 0% ~ (p=1.000 n=40) ¹ CmdGoSize 308.3Ki ± 0% 298.5Ki ± 0% -3.19% (n=40) geomean 66.10Ki 65.04Ki -1.61% ¹ all samples are equal │ out.base.txt │ out.wrap.txt │ │ bss-bytes │ bss-bytes vs base │ HelloSize 197.3Ki ± 0% 197.3Ki ± 0% ~ (p=1.000 n=40) ¹ CmdGoSize 228.2Ki ± 0% 228.1Ki ± 0% -0.01% (n=40) geomean 212.2Ki 212.1Ki -0.01% ¹ all samples are equal │ out.base.txt │ out.wrap.txt │ │ exe-bytes │ exe-bytes vs base │ HelloSize 1.192Mi ± 0% 1.192Mi ± 0% +0.00% (p=0.000 n=40) CmdGoSize 14.85Mi ± 0% 14.83Mi ± 0% -0.09% (n=40) geomean 4.207Mi 4.205Mi -0.05% Also tested for any linker changes by benchmarking relink of k8s "kubelet"; no changes to speak of there. Updates #2559. Updates #36021. Updates #14840. Change-Id: I4cc5370b3f20679a1065aaaf87bdf2881e257631 Reviewed-on: https://go-review.googlesource.com/c/go/+/463395 Run-TryBot: Than McIntosh <thanm@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
2023-02-02runtime: eliminate arbitrary timeout in TestCgoLockOSThreadExitBryan C. Mills
This test previously failed if running a new pthread took longer than a hard-coded 100ms. On some slow or heavily-loaded builders, that scheduling latency is too short. Since the point of this test is to verify that the background thread is not reused after it terminates (see #20395), the arbitrary time limit does not seem helpful: if the background thread fails to terminate the test will time out on its own, and if the main goroutine is scheduled on the background thread the test will fail regardless of how long it takes. Fixes #58247. Change-Id: I626af52aac55af7a4c0e7829798573c479750c20 Reviewed-on: https://go-review.googlesource.com/c/go/+/464735 Run-TryBot: Bryan Mills <bcmills@google.com> Reviewed-by: Michael Pratt <mpratt@google.com> Auto-Submit: Bryan Mills <bcmills@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
2023-01-31runtime: always use LoadLibraryEx to load system librariesqmuntal
This CL removes a fallback that used LoadLibraryA when the runtime was loading system DLLs on Windows 7, Windows Server 2008 R2, or earlier. We can safely remove that fallback now, as go1.21 will require at least Windows 8 or Server 2012. This CL also saves some syscall initialization time and bytes: new: init syscall @2.3 ms, 0 ms clock, 1000 bytes, 18 allocs old: init syscall @3.6 ms, 0.52 ms clock, 1744 bytes, 24 allocs Updates #57003 Change-Id: I7dcc1173537785b6b580e9f78632c0c74da658d4 Reviewed-on: https://go-review.googlesource.com/c/go/+/463842 Reviewed-by: Bryan Mills <bcmills@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> Run-TryBot: Quim Muntal <quimmuntal@gmail.com> Reviewed-by: Damien Neil <dneil@google.com>
2023-01-31runtime/cgo: remove APPLE macros on 386, arm, and ppc64 assembly filesCherry Mui
We don't support Apple platform on 386, ARM, or PPC64. Remove dead code. Change-Id: I5722bf58c0fb73c5db4ba016cb424e392739c7de Reviewed-on: https://go-review.googlesource.com/c/go/+/455162 Run-TryBot: Cherry Mui <cherryyz@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com>
2023-01-31cmd/compile: inline known-size memclrNoHeapPointers callsJakub Ciolek
This patch rewrites known-size calls to memclrNoHeapPointers with an OpZero. This significantly improves performance and lets some clears get DSE'd. One of the cases where this applies is zeroing a known-size array, example: var x [256]int8 ... for a := range x { x[a] = 0 } Other cases can be found in the runtime itself where memclrNoHeapPointers is sometimes directly invoked with a constant. It seems that for some sized-clears on some architectures (AMD64, maybe others) the memcrlNoHeapPointers is more performant than OpZero. See the issue #56997 for more details. Benches ARM (M1 Pro): name old time/op new time/op delta MemclrKnownSize1-10 2.03ns ± 0% 0.31ns ± 0% -84.69% (p=0.000 n=18+19) MemclrKnownSize2-10 1.97ns ± 0% 0.31ns ± 0% -84.19% (p=0.000 n=12+19) MemclrKnownSize4-10 2.02ns ± 0% 0.31ns ± 0% -84.56% (p=0.000 n=12+20) MemclrKnownSize8-10 2.02ns ± 0% 0.31ns ± 0% -84.59% (p=0.000 n=14+19) MemclrKnownSize16-10 2.15ns ± 0% 0.31ns ± 0% -85.50% (p=0.000 n=18+19) MemclrKnownSize32-10 2.48ns ± 0% 0.31ns ± 0% -87.48% (p=0.000 n=20+19) MemclrKnownSize64-10 1.93ns ± 0% 0.62ns ± 0% -67.88% (p=0.000 n=20+19) MemclrKnownSize112-10 2.48ns ± 0% 1.80ns ± 0% -27.74% (p=0.000 n=19+20) MemclrKnownSize128-10 10.0ns ±112% 2.0ns ± 0% -79.76% (p=0.000 n=18+17) MemclrKnownSize192-10 27.4ns ±103% 2.6ns ± 0% -90.38% (p=0.000 n=16+19) MemclrKnownSize248-10 9.67ns ±43% 3.26ns ± 0% -66.29% (p=0.000 n=19+19) MemclrKnownSize256-10 85.4ns ±148% 3.3ns ± 0% -96.18% (p=0.000 n=20+20) MemclrKnownSize512-10 223ns ±54% 6ns ± 0% -97.42% (p=0.000 n=18+20) MemclrKnownSize1024-10 216ns ±26% 11ns ± 0% -95.00% (p=0.000 n=18+15) MemclrKnownSize4096-10 265ns ± 2% 88ns ± 0% -66.84% (p=0.000 n=19+17) MemclrKnownSize512KiB-10 9.91µs ± 1% 10.23µs ± 2% +3.14% (p=0.000 n=19+19) [Geo mean] 15.6ns 2.5ns -83.62% name old speed new speed delta MemclrKnownSize1-10 493MB/s ± 0% 3216MB/s ± 0% +553.04% (p=0.000 n=18+19) MemclrKnownSize2-10 1.02GB/s ± 0% 6.43GB/s ± 0% +532.33% (p=0.000 n=16+19) MemclrKnownSize4-10 1.99GB/s ± 0% 12.86GB/s ± 0% +547.67% (p=0.000 n=18+20) MemclrKnownSize8-10 3.96GB/s ± 0% 25.72GB/s ± 0% +548.81% (p=0.000 n=19+19) MemclrKnownSize16-10 7.46GB/s ± 0% 51.43GB/s ± 0% +589.72% (p=0.000 n=20+19) MemclrKnownSize32-10 12.9GB/s ± 0% 102.9GB/s ± 0% +698.60% (p=0.000 n=20+18) MemclrKnownSize64-10 33.1GB/s ± 0% 103.0GB/s ± 0% +211.34% (p=0.000 n=19+19) MemclrKnownSize112-10 45.1GB/s ± 0% 62.4GB/s ± 0% +38.38% (p=0.000 n=19+20) MemclrKnownSize128-10 13.3GB/s ±107% 63.5GB/s ± 0% +378.03% (p=0.000 n=19+18) MemclrKnownSize192-10 6.97GB/s ±139% 72.72GB/s ± 0% +943.44% (p=0.000 n=19+19) MemclrKnownSize248-10 25.9GB/s ±46% 76.1GB/s ± 0% +194.16% (p=0.000 n=20+17) MemclrKnownSize256-10 8.64GB/s ±196% 78.51GB/s ± 0% +808.19% (p=0.000 n=20+20) MemclrKnownSize512-10 2.33GB/s ±86% 89.13GB/s ± 0% +3719.50% (p=0.000 n=17+20) MemclrKnownSize1024-10 4.85GB/s ±32% 94.93GB/s ± 0% +1856.74% (p=0.000 n=18+19) MemclrKnownSize4096-10 15.4GB/s ± 2% 46.6GB/s ± 0% +201.55% (p=0.000 n=19+18) MemclrKnownSize512KiB-10 52.9GB/s ± 1% 51.3GB/s ± 2% -3.04% (p=0.000 n=19+19) [Geo mean] 7.54GB/s 42.86GB/s +468.76% Intel Alder Lake 12600k: name old time/op new time/op delta MemclrKnownSize1-16 0.59ns ± 3% 0.38ns ± 6% -36.00% (p=0.000 n=19+18) MemclrKnownSize2-16 0.57ns ± 1% 0.19ns ± 5% -66.27% (p=0.000 n=19+19) MemclrKnownSize4-16 0.66ns ± 2% 0.36ns ±21% -45.12% (p=0.000 n=19+20) MemclrKnownSize8-16 0.74ns ± 1% 0.30ns ±26% -59.81% (p=0.000 n=18+20) MemclrKnownSize16-16 1.00ns ± 7% 0.21ns ± 8% -79.51% (p=0.000 n=20+19) MemclrKnownSize32-16 0.95ns ± 1% 0.40ns ± 1% -57.61% (p=0.000 n=20+18) MemclrKnownSize64-16 1.20ns ± 2% 0.41ns ± 0% -65.82% (p=0.000 n=20+18) MemclrKnownSize112-16 1.27ns ± 2% 1.03ns ± 0% -19.35% (p=0.000 n=20+18) MemclrKnownSize128-16 1.34ns ± 2% 1.03ns ± 0% -23.02% (p=0.000 n=20+20) MemclrKnownSize192-16 1.92ns ± 2% 1.44ns ± 0% -24.89% (p=0.000 n=20+16) MemclrKnownSize248-16 2.77ns ± 1% 3.29ns ± 0% +18.81% (p=0.000 n=20+16) MemclrKnownSize256-16 1.92ns ± 1% 1.86ns ± 0% -3.49% (p=0.000 n=19+15) MemclrKnownSize512-16 2.81ns ± 2% 3.49ns ± 0% +24.15% (p=0.000 n=20+17) MemclrKnownSize1024-16 4.02ns ± 1% 6.78ns ± 0% +68.44% (p=0.000 n=20+18) MemclrKnownSize4096-16 17.2ns ± 2% 14.4ns ± 0% -16.73% (p=0.000 n=20+17) MemclrKnownSize512KiB-16 6.71µs ± 1% 6.52µs ± 0% -2.85% (p=0.000 n=20+18) [Geo mean] 2.60ns 1.71ns -34.06% name old speed new speed delta MemclrKnownSize1-16 1.71GB/s ± 3% 2.67GB/s ± 6% +56.39% (p=0.000 n=19+18) MemclrKnownSize2-16 3.52GB/s ± 2% 10.43GB/s ± 6% +196.04% (p=0.000 n=20+20) MemclrKnownSize4-16 6.06GB/s ± 1% 10.83GB/s ±11% +78.63% (p=0.000 n=19+18) MemclrKnownSize8-16 10.7GB/s ± 1% 27.0GB/s ±21% +151.49% (p=0.000 n=18+20) MemclrKnownSize16-16 16.0GB/s ± 8% 78.1GB/s ± 7% +387.24% (p=0.000 n=20+19) MemclrKnownSize32-16 33.6GB/s ± 1% 79.4GB/s ± 1% +135.89% (p=0.000 n=20+18) MemclrKnownSize64-16 53.3GB/s ± 2% 155.9GB/s ± 0% +192.58% (p=0.000 n=20+18) MemclrKnownSize112-16 88.0GB/s ± 2% 109.1GB/s ± 0% +23.97% (p=0.000 n=20+18) MemclrKnownSize128-16 95.3GB/s ± 2% 123.8GB/s ± 0% +29.88% (p=0.000 n=20+20) MemclrKnownSize192-16 100GB/s ± 2% 133GB/s ± 0% +33.12% (p=0.000 n=20+17) MemclrKnownSize248-16 89.7GB/s ± 1% 75.5GB/s ± 0% -15.84% (p=0.000 n=20+19) MemclrKnownSize256-16 133GB/s ± 1% 138GB/s ± 0% +3.61% (p=0.000 n=19+14) MemclrKnownSize512-16 182GB/s ± 2% 147GB/s ± 0% -19.46% (p=0.000 n=20+17) MemclrKnownSize1024-16 254GB/s ± 1% 151GB/s ± 0% -40.64% (p=0.000 n=20+18) MemclrKnownSize4096-16 237GB/s ± 2% 285GB/s ± 0% +20.09% (p=0.000 n=20+17) MemclrKnownSize512KiB-16 78.2GB/s ± 1% 80.4GB/s ± 0% +2.93% (p=0.000 n=20+18) [Geo mean] 42.1GB/s 63.8GB/s +51.53% compilecmp linux/amd64: runtime runtime.(*pallocData).allocAll 85 -> 45 (-47.06%) runtime.(*pageAlloc).allocRange 942 -> 923 (-2.02%) runtime.(*pageAlloc).free 798 -> 774 (-3.01%) runtime.(*pageBits).clearAll 66 -> 20 (-69.70%) runtime.startCheckmarks 255 -> 246 (-3.53%) runtime.(*pallocData).freeAll 86 -> 46 (-46.51%) runtime.(*pallocBits).freeAll 66 -> 20 (-69.70%) runtime.(*consistentHeapStats).unsafeClear 66 -> 19 (-71.21%) runtime.newproc1 965 -> 933 (-3.32%) crypto/rc4 crypto/rc4.(*Cipher).Reset 78 -> 69 (-11.54%) compress/bzip2 compress/bzip2.(*reader).readBlock 2973 -> 2941 (-1.08%) image/jpeg image/jpeg.(*decoder).processDHT 1179 -> 1166 (-1.10%) index/suffixarray index/suffixarray.bucketMax_8_32 394 -> 241 (-38.83%) index/suffixarray.freq_8_32 317 -> 185 (-41.64%) index/suffixarray.freq_8_64 317 -> 178 (-43.85%) index/suffixarray.bucketMin_8_32 394 -> 243 (-38.32%) index/suffixarray.bucketMin_8_64 398 -> 234 (-41.21%) index/suffixarray.bucketMax_8_64 398 -> 234 (-41.21%) compress/flate compress/flate.(*huffmanBitWriter).generateCodegen 965 -> 838 (-13.16%) compress/flate.(*compressor).reset 429 -> 409 (-4.66%) cmd/vendor/golang.org/x/sys/unix cmd/vendor/golang.org/x/sys/unix.(*FdSet).Zero 66 -> 60 (-9.09%) cmd/vendor/golang.org/x/sys/unix.(*Ifreq).SetInet4Addr 211 -> 129 (-38.86%) cmd/vendor/golang.org/x/sys/unix.(*Ifreq).SetUint32 98 -> 14 (-85.71%) cmd/vendor/golang.org/x/sys/unix.(*Ifreq).clear 66 -> 11 (-83.33%) cmd/vendor/golang.org/x/sys/unix.(*Ifreq).SetUint16 101 -> 15 (-85.15%) cmd/vendor/golang.org/x/sys/unix.(*CPUSet).Zero 66 -> 60 (-9.09%) internal/coverage/decodemeta internal/coverage/decodemeta.(*CoverageMetaFileReader).rdUint64 325 -> 293 (-9.85%) crypto/tls crypto/tls.(*halfConn).setTrafficSecret 253 -> 247 (-2.37%) crypto/tls.(*Conn).readRecordOrCCS 10315 -> 10283 (-0.31%) crypto/tls.(*halfConn).changeCipherSpec 271 -> 261 (-3.69%) crypto/tls.(*Conn).writeRecordLocked 1765 -> 1748 (-0.96%) file before after Δ % runtime.s 512467 512164 -303 -0.059% crypto/rc4.s 955 946 -9 -0.942% compress/bzip2.s 9586 9554 -32 -0.334% image/jpeg.s 32122 32109 -13 -0.040% index/suffixarray.s 38547 37644 -903 -2.343% compress/flate.s 46668 46521 -147 -0.315% cmd/vendor/golang.org/x/sys/unix.s 118620 118301 -319 -0.269% internal/coverage/decodemeta.s 7224 7192 -32 -0.443% crypto/tls.s 288762 288697 -65 -0.023% cmd/compile/internal/ssa.s 3639799 3640727 +928 +0.025% total 20790248 20789353 -895 -0.004% src/runtime benchmarks (Linux Alder Lake 12600k): name old time/op new time/op delta MakeChan/Byte-16 26.2ns ± 2% 25.6ns ± 3% -2.05% (p=0.003 n=9+10) MakeChan/Int-16 33.9ns ± 2% 33.3ns ± 4% -1.99% (p=0.015 n=10+10) MakeChan/Ptr-16 54.2ns ± 2% 53.7ns ± 1% -0.90% (p=0.016 n=10+9) MakeChan/Struct/0-16 23.8ns ± 3% 23.4ns ± 1% -1.72% (p=0.009 n=10+8) MakeChan/Struct/32-16 55.9ns ± 2% 53.9ns ± 1% -3.48% (p=0.000 n=10+10) MakeChan/Struct/40-16 63.5ns ± 1% 61.1ns ± 2% -3.79% (p=0.000 n=10+9) ChanNonblocking-16 0.22ns ± 0% 0.22ns ± 0% +0.40% (p=0.011 n=9+8) SelectUncontended-16 4.63ns ± 1% 4.62ns ± 0% -0.35% (p=0.001 n=10+8) SelectSyncContended-16 1.58µs ± 2% 1.59µs ± 1% ~ (p=0.540 n=10+10) SelectAsyncContended-16 290ns ± 0% 291ns ± 0% +0.14% (p=0.012 n=8+9) SelectNonblock-16 0.95ns ± 1% 0.95ns ± 1% ~ (p=0.546 n=9+9) ChanUncontended-16 239ns ± 3% 242ns ± 6% ~ (p=0.886 n=9+10) ChanContended-16 17.7µs ± 1% 18.2µs ± 1% +2.87% (p=0.000 n=10+9) ChanSync-16 109ns ± 2% 109ns ± 1% ~ (p=0.342 n=10+10) ChanSyncWork-16 6.55µs ± 1% 6.53µs ± 1% ~ (p=0.101 n=10+10) ChanProdCons0-16 502ns ± 1% 499ns ± 0% -0.55% (p=0.001 n=10+9) ChanProdCons10-16 373ns ± 2% 377ns ± 1% ~ (p=0.095 n=10+9) ChanProdCons100-16 224ns ± 2% 223ns ± 3% ~ (p=0.150 n=9+10) ChanProdConsWork0-16 491ns ± 1% 484ns ± 0% -1.26% (p=0.000 n=10+9) ChanProdConsWork10-16 451ns ± 2% 448ns ± 2% ~ (p=0.210 n=8+10) ChanProdConsWork100-16 406ns ± 0% 407ns ± 1% ~ (p=0.138 n=8+8) SelectProdCons-16 509ns ± 0% 509ns ± 0% ~ (p=0.917 n=9+9) ReceiveDataFromClosedChan-16 12.1ns ± 0% 12.1ns ± 0% ~ (p=0.780 n=10+10) ChanCreation-16 22.6ns ± 1% 22.4ns ± 0% -0.72% (p=0.001 n=10+8) ChanSem-16 165ns ± 1% 166ns ± 1% +0.72% (p=0.002 n=10+10) ChanPopular-16 500µs ± 2% 498µs ± 1% ~ (p=0.218 n=10+10) ChanClosed-16 0.29ns ± 0% 0.29ns ± 0% +0.09% (p=0.019 n=9+8) CallClosure-16 1.28ns ± 0% 1.27ns ± 0% -0.51% (p=0.000 n=9+9) CallClosure1-16 1.50ns ± 0% 1.50ns ± 0% ~ (p=0.123 n=9+9) CallClosure2-16 8.86ns ± 1% 8.86ns ± 3% ~ (p=0.590 n=9+10) CallClosure3-16 8.75ns ± 2% 8.69ns ± 2% ~ (p=0.247 n=10+10) CallClosure4-16 8.65ns ± 2% 8.56ns ± 2% ~ (p=0.105 n=10+10) Complex128DivNormal-16 2.47ns ± 0% 2.47ns ± 0% ~ (p=0.790 n=10+9) Complex128DivNisNaN-16 4.44ns ± 0% 4.43ns ± 0% ~ (p=0.564 n=10+10) Complex128DivDisNaN-16 4.48ns ± 0% 4.48ns ± 0% ~ (p=0.101 n=10+10) Complex128DivNisInf-16 2.58ns ± 0% 2.58ns ± 0% ~ (p=0.808 n=10+10) Complex128DivDisInf-16 6.30ns ± 0% 6.31ns ± 0% ~ (p=0.305 n=10+10) SetTypePtr-16 0.73ns ± 1% 0.73ns ± 3% ~ (p=0.644 n=10+10) SetTypePtr8-16 4.12ns ± 0% 4.12ns ± 0% ~ (p=0.127 n=10+10) SetTypePtr16-16 4.13ns ± 1% 4.12ns ± 0% ~ (p=0.109 n=10+10) SetTypePtr32-16 4.12ns ± 0% 4.12ns ± 0% ~ (p=0.203 n=9+10) SetTypePtr64-16 4.12ns ± 0% 4.12ns ± 0% ~ (p=0.696 n=10+10) SetTypePtr126-16 6.91ns ± 0% 6.91ns ± 0% ~ (p=0.469 n=10+10) SetTypePtr128-16 6.66ns ± 0% 6.67ns ± 0% ~ (p=0.246 n=9+10) SetTypePtrSlice-16 54.1ns ± 1% 54.1ns ± 1% ~ (p=0.509 n=9+10) SetTypeNode1-16 4.13ns ± 1% 4.12ns ± 0% ~ (p=0.342 n=10+10) SetTypeNode1Slice-16 10.1ns ± 1% 10.0ns ± 1% -1.18% (p=0.000 n=10+10) SetTypeNode8-16 4.12ns ± 0% 4.12ns ± 0% ~ (p=0.137 n=8+8) SetTypeNode8Slice-16 22.6ns ± 0% 22.6ns ± 0% ~ (p=0.423 n=10+10) SetTypeNode64-16 6.90ns ± 0% 6.91ns ± 0% ~ (p=0.275 n=10+10) SetTypeNode64Slice-16 173ns ± 0% 173ns ± 0% ~ (p=0.610 n=9+10) SetTypeNode64Dead-16 5.53ns ± 0% 5.52ns ± 0% ~ (p=0.123 n=10+6) SetTypeNode64DeadSlice-16 150ns ± 0% 150ns ± 0% ~ (p=0.398 n=10+10) SetTypeNode124-16 6.90ns ± 0% 6.90ns ± 0% ~ (p=0.779 n=10+10) SetTypeNode124Slice-16 222ns ± 5% 217ns ± 0% ~ (p=0.302 n=10+10) SetTypeNode126-16 6.66ns ± 0% 6.66ns ± 0% ~ (p=0.324 n=10+9) SetTypeNode126Slice-16 218ns ± 0% 218ns ± 0% ~ (p=0.119 n=9+10) SetTypeNode128-16 9.76ns ± 0% 9.73ns ± 0% -0.31% (p=0.003 n=9+10) SetTypeNode128Slice-16 279ns ± 0% 278ns ± 0% ~ (p=0.112 n=10+9) SetTypeNode130-16 9.77ns ± 0% 9.73ns ± 0% -0.33% (p=0.002 n=10+10) SetTypeNode130Slice-16 284ns ± 0% 284ns ± 0% ~ (p=0.668 n=10+10) SetTypeNode1024-16 51.2ns ± 0% 51.6ns ± 1% ~ (p=0.080 n=9+9) SetTypeNode1024Slice-16 1.83µs ± 0% 1.82µs ± 0% ~ (p=0.115 n=10+10) Allocation-16 4.64µs ± 1% 4.37µs ± 1% -5.69% (p=0.000 n=9+9) ReadMemStats-16 5.62µs ± 2% 5.55µs ± 5% -1.36% (p=0.050 n=10+10) WriteBarrier-16 4.95ns ± 3% 4.99ns ± 3% ~ (p=0.255 n=10+10) BulkWriteBarrier-16 1.69ns ± 2% 1.63ns ± 4% -3.77% (p=0.001 n=10+10) ScanStackNoLocals-16 12.8ms ± 2% 12.9ms ± 1% +0.72% (p=0.019 n=10+10) MSpanCountAlloc/bits=64-16 1.65ns ± 0% 1.65ns ± 0% ~ (p=0.124 n=10+10) MSpanCountAlloc/bits=128-16 2.08ns ± 1% 2.06ns ± 1% -0.87% (p=0.000 n=10+10) MSpanCountAlloc/bits=256-16 2.71ns ± 1% 2.69ns ± 1% -0.74% (p=0.001 n=10+9) MSpanCountAlloc/bits=512-16 4.15ns ± 0% 4.23ns ± 2% +2.15% (p=0.000 n=10+10) MSpanCountAlloc/bits=1024-16 7.89ns ± 1% 7.89ns ± 1% ~ (p=0.867 n=10+10) Hash5-16 1.93ns ± 1% 2.01ns ± 0% +3.99% (p=0.000 n=10+8) Hash16-16 2.04ns ± 1% 2.21ns ± 1% +8.61% (p=0.000 n=10+10) Hash64-16 2.67ns ± 0% 2.67ns ± 0% ~ (p=0.154 n=9+9) Hash1024-16 16.4ns ± 0% 16.4ns ± 0% +0.17% (p=0.020 n=9+10) Hash65536-16 886ns ± 0% 885ns ± 0% ~ (p=0.725 n=10+10) AlignedLoad-16 0.96ns ± 2% 0.95ns ± 3% ~ (p=0.123 n=10+10) UnalignedLoad-16 0.95ns ± 2% 1.01ns ± 2% +6.31% (p=0.000 n=10+10) EqEfaceConcrete-16 0.31ns ± 3% 0.33ns ± 5% +8.10% (p=0.000 n=10+10) EqIfaceConcrete-16 0.31ns ±13% 0.28ns ± 2% -9.23% (p=0.001 n=10+10) NeEfaceConcrete-16 0.29ns ± 1% 0.31ns ± 7% +5.59% (p=0.010 n=8+8) NeIfaceConcrete-16 0.28ns ± 2% 0.29ns ± 1% +4.49% (p=0.000 n=9+8) ConvT2EByteSized/bool-16 0.53ns ± 1% 0.52ns ± 1% -2.18% (p=0.000 n=10+10) ConvT2EByteSized/uint8-16 0.53ns ± 1% 0.53ns ± 0% +1.22% (p=0.000 n=10+10) ConvT2ESmall-16 1.13ns ± 0% 1.13ns ± 0% ~ (p=0.774 n=9+9) ConvT2EUintptr-16 1.03ns ± 0% 1.04ns ± 0% +0.50% (p=0.000 n=10+8) ConvT2ELarge-16 14.4ns ± 2% 14.4ns ± 1% ~ (p=0.726 n=10+10) ConvT2ISmall-16 1.13ns ± 0% 1.13ns ± 0% ~ (p=0.693 n=9+10) ConvT2IUintptr-16 1.03ns ± 0% 1.03ns ± 0% +0.44% (p=0.000 n=10+10) ConvT2ILarge-16 14.2ns ± 1% 14.4ns ± 1% +0.85% (p=0.007 n=9+10) ConvI2E-16 0.54ns ± 1% 0.54ns ± 0% -0.39% (p=0.037 n=10+8) ConvI2I-16 2.68ns ± 0% 2.70ns ± 1% +0.73% (p=0.000 n=9+10) AssertE2T-16 0.28ns ± 1% 0.39ns ± 5% +37.38% (p=0.000 n=10+10) AssertE2TLarge-16 0.42ns ± 2% 0.48ns ± 1% +14.92% (p=0.000 n=9+10) AssertE2I-16 2.67ns ± 0% 2.67ns ± 0% ~ (p=0.352 n=9+9) AssertI2T-16 0.37ns ± 3% 0.34ns ± 1% -6.16% (p=0.000 n=10+10) AssertI2I-16 2.67ns ± 0% 2.67ns ± 0% ~ (p=0.286 n=10+10) AssertI2E-16 0.54ns ± 1% 0.54ns ± 0% -0.94% (p=0.000 n=10+10) AssertE2E-16 0.41ns ± 0% 0.41ns ± 1% ~ (p=0.880 n=9+9) AssertE2T2-16 0.41ns ± 1% 0.41ns ± 1% ~ (p=0.725 n=10+10) AssertE2T2Blank-16 0.24ns ± 5% 0.21ns ± 1% -14.79% (p=0.000 n=10+9) AssertI2E2-16 0.69ns ± 0% 0.69ns ± 1% ~ (p=0.541 n=10+10) AssertI2E2Blank-16 0.26ns ± 9% 0.21ns ± 1% -18.86% (p=0.000 n=10+9) AssertE2E2-16 0.53ns ± 1% 0.53ns ± 1% +0.72% (p=0.004 n=10+10) AssertE2E2Blank-16 0.23ns ± 4% 0.21ns ± 1% -8.42% (p=0.000 n=10+10) ConvT2Ezero/zero/16-16 1.13ns ± 0% 1.14ns ± 1% ~ (p=0.583 n=9+10) ConvT2Ezero/zero/32-16 1.13ns ± 0% 1.13ns ± 0% ~ (p=0.417 n=10+10) ConvT2Ezero/zero/64-16 1.03ns ± 1% 1.03ns ± 0% ~ (p=0.051 n=10+10) ConvT2Ezero/zero/str-16 1.03ns ± 0% 1.03ns ± 0% ~ (p=0.132 n=10+10) ConvT2Ezero/zero/slice-16 1.14ns ± 0% 1.15ns ± 0% +0.49% (p=0.001 n=10+10) ConvT2Ezero/zero/big-16 123ns ± 1% 123ns ± 1% ~ (p=0.171 n=10+10) ConvT2Ezero/nonzero/str-16 19.4ns ± 1% 19.3ns ± 3% ~ (p=0.548 n=9+10) ConvT2Ezero/nonzero/slice-16 22.2ns ± 2% 22.0ns ± 2% ~ (p=0.109 n=10+10) ConvT2Ezero/nonzero/big-16 123ns ± 1% 123ns ± 1% ~ (p=0.446 n=10+8) ConvT2Ezero/smallint/16-16 1.13ns ± 0% 1.14ns ± 1% ~ (p=0.362 n=10+10) ConvT2Ezero/smallint/32-16 1.13ns ± 0% 1.13ns ± 0% ~ (p=0.907 n=10+9) ConvT2Ezero/smallint/64-16 1.04ns ± 0% 1.03ns ± 0% -0.38% (p=0.002 n=10+10) ConvT2Ezero/largeint/16-16 6.65ns ± 1% 6.65ns ± 2% ~ (p=0.618 n=10+9) ConvT2Ezero/largeint/32-16 6.75ns ± 3% 6.63ns ± 2% -1.77% (p=0.015 n=10+10) ConvT2Ezero/largeint/64-16 9.19ns ± 1% 9.26ns ± 2% ~ (p=0.123 n=10+10) Malloc8-16 8.66ns ± 1% 8.89ns ± 2% +2.74% (p=0.000 n=10+10) Malloc16-16 13.7ns ± 1% 13.8ns ± 1% +0.71% (p=0.022 n=10+8) MallocTypeInfo8-16 11.7ns ± 3% 11.6ns ± 2% ~ (p=0.469 n=10+10) MallocTypeInfo16-16 18.3ns ± 1% 18.2ns ± 2% ~ (p=0.251 n=9+10) MallocLargeStruct-16 195ns ± 1% 198ns ± 1% +1.65% (p=0.000 n=9+10) GoroutineSelect-16 1.10ms ± 1% 1.12ms ± 1% +1.36% (p=0.000 n=10+8) GoroutineBlocking-16 986µs ± 1% 998µs ± 1% +1.23% (p=0.002 n=10+10) GoroutineForRange-16 985µs ± 1% 1001µs ± 1% +1.68% (p=0.000 n=10+10) GoroutineIdle-16 679µs ± 1% 691µs ± 0% +1.74% (p=0.000 n=10+9) HashStringSpeed-16 5.33ns ± 5% 5.19ns ± 4% ~ (p=0.113 n=9+9) HashBytesSpeed-16 8.20ns ± 3% 8.24ns ± 1% ~ (p=0.497 n=10+9) HashInt32Speed-16 4.01ns ± 2% 3.90ns ± 4% -2.63% (p=0.011 n=9+10) HashInt64Speed-16 3.94ns ± 4% 3.79ns ± 1% -3.74% (p=0.003 n=10+9) HashStringArraySpeed-16 12.5ns ± 4% 12.3ns ± 1% ~ (p=0.055 n=10+10) MegMap-16 3.72ns ± 1% 3.73ns ± 1% ~ (p=0.484 n=9+10) MegOneMap-16 2.28ns ± 1% 2.27ns ± 1% ~ (p=0.287 n=10+10) MegEqMap-16 22.0µs ± 3% 22.3µs ± 2% +1.48% (p=0.028 n=10+9) MegEmptyMap-16 0.93ns ± 1% 0.92ns ± 1% -0.52% (p=0.030 n=10+10) SmallStrMap-16 3.77ns ± 0% 3.77ns ± 0% ~ (p=0.324 n=10+10) MapStringKeysEight_16-16 3.91ns ± 0% 3.91ns ± 0% ~ (p=0.088 n=9+9) MapStringKeysEight_32-16 3.58ns ± 1% 3.50ns ± 0% -2.11% (p=0.000 n=10+10) MapStringKeysEight_64-16 3.58ns ± 1% 3.50ns ± 0% -2.23% (p=0.000 n=10+10) MapStringKeysEight_1M-16 3.57ns ± 1% 3.50ns ± 0% -1.92% (p=0.000 n=10+10) IntMap-16 2.89ns ± 1% 2.89ns ± 0% ~ (p=0.381 n=10+10) MapFirst/1-16 1.60ns ± 1% 1.59ns ± 2% -0.49% (p=0.020 n=10+9) MapFirst/2-16 1.61ns ± 0% 1.59ns ± 1% -1.17% (p=0.001 n=10+10) MapFirst/3-16 1.61ns ± 1% 1.59ns ± 1% -1.45% (p=0.000 n=10+10) MapFirst/4-16 1.60ns ± 1% 1.59ns ± 1% -1.16% (p=0.000 n=10+10) MapFirst/5-16 1.60ns ± 1% 1.58ns ± 1% -0.98% (p=0.000 n=10+10) MapFirst/6-16 1.60ns ± 1% 1.59ns ± 1% -0.87% (p=0.001 n=10+10) MapFirst/7-16 1.60ns ± 1% 1.59ns ± 1% -0.79% (p=0.002 n=10+10) MapFirst/8-16 1.60ns ± 1% 1.59ns ± 1% -0.67% (p=0.017 n=9+10) MapFirst/9-16 2.83ns ± 0% 2.83ns ± 0% ~ (p=0.492 n=10+10) MapFirst/10-16 2.83ns ± 0% 2.84ns ± 0% +0.24% (p=0.017 n=10+10) MapFirst/11-16 2.83ns ± 0% 2.83ns ± 0% ~ (p=0.445 n=10+10) MapFirst/12-16 2.83ns ± 0% 2.83ns ± 0% ~ (p=0.564 n=10+10) MapFirst/13-16 2.83ns ± 0% 2.84ns ± 0% ~ (p=0.175 n=9+10) MapFirst/14-16 2.83ns ± 0% 2.83ns ± 0% ~ (p=0.322 n=10+9) MapFirst/15-16 2.83ns ± 0% 2.84ns ± 1% ~ (p=0.209 n=10+10) MapFirst/16-16 2.83ns ± 1% 2.84ns ± 0% ~ (p=0.238 n=10+10) MapMid/1-16 1.64ns ± 0% 1.64ns ± 0% ~ (p=0.453 n=10+9) MapMid/2-16 1.86ns ± 1% 1.86ns ± 0% ~ (p=0.764 n=10+9) MapMid/3-16 1.86ns ± 0% 1.86ns ± 1% ~ (p=1.000 n=10+10) MapMid/4-16 2.06ns ± 0% 2.06ns ± 0% -0.27% (p=0.014 n=10+9) MapMid/5-16 2.06ns ± 0% 2.06ns ± 0% ~ (p=0.075 n=9+10) MapMid/6-16 2.27ns ± 0% 2.27ns ± 1% ~ (p=0.898 n=10+10) MapMid/7-16 2.27ns ± 1% 2.26ns ± 0% -0.23% (p=0.049 n=10+10) MapMid/8-16 2.47ns ± 0% 2.47ns ± 1% ~ (p=0.840 n=10+10) MapMid/9-16 4.21ns ± 7% 4.13ns ±19% ~ (p=0.315 n=10+10) MapMid/10-16 4.17ns ± 7% 4.31ns ± 5% +3.37% (p=0.021 n=10+9) MapMid/11-16 4.18ns ± 7% 4.32ns ± 6% +3.50% (p=0.015 n=10+10) MapMid/12-16 4.34ns ± 7% 4.30ns ± 5% ~ (p=0.858 n=9+10) MapMid/13-16 4.25ns ± 6% 4.28ns ± 6% ~ (p=0.489 n=9+9) MapMid/14-16 3.75ns ±23% 3.90ns ±16% ~ (p=0.353 n=10+10) MapMid/15-16 3.87ns ±25% 3.95ns ±26% ~ (p=0.315 n=10+10) MapMid/16-16 4.06ns ±19% 3.94ns ±16% ~ (p=0.796 n=10+10) MapLast/1-16 1.65ns ± 0% 1.65ns ± 0% ~ (p=0.607 n=10+10) MapLast/2-16 1.86ns ± 0% 1.86ns ± 0% +0.26% (p=0.029 n=10+10) MapLast/3-16 2.06ns ± 1% 2.06ns ± 0% ~ (p=0.689 n=8+9) MapLast/4-16 2.27ns ± 1% 2.26ns ± 0% ~ (p=0.148 n=10+9) MapLast/5-16 2.47ns ± 0% 2.47ns ± 0% ~ (p=0.385 n=9+10) MapLast/6-16 2.67ns ± 0% 2.68ns ± 0% ~ (p=0.202 n=9+10) MapLast/7-16 2.88ns ± 0% 2.88ns ± 0% ~ (p=0.751 n=10+10) MapLast/8-16 3.08ns ± 0% 3.08ns ± 0% ~ (p=0.826 n=10+9) MapLast/9-16 4.31ns ± 6% 4.54ns ± 5% ~ (p=0.070 n=9+8) MapLast/10-16 4.25ns ± 5% 4.42ns ± 6% ~ (p=0.321 n=9+8) MapLast/11-16 4.59ns ±16% 5.42ns ±44% +17.99% (p=0.019 n=10+10) MapLast/12-16 5.04ns ±19% 6.11ns ±28% +21.35% (p=0.005 n=9+10) MapLast/13-16 6.00ns ±35% 5.76ns ± 3% ~ (p=0.173 n=10+8) MapLast/14-16 4.27ns ± 5% 4.53ns ± 6% +6.14% (p=0.007 n=10+10) MapLast/15-16 4.41ns ± 1% 4.44ns ± 7% ~ (p=0.515 n=8+10) MapLast/16-16 4.18ns ± 6% 4.99ns ±18% +19.48% (p=0.000 n=10+10) MapCycle-16 7.48ns ± 2% 7.46ns ± 1% ~ (p=0.699 n=10+10) RepeatedLookupStrMapKey32-16 6.98ns ± 3% 6.73ns ± 2% -3.63% (p=0.000 n=10+10) RepeatedLookupStrMapKey1M-16 14.7µs ± 5% 14.7µs ± 4% ~ (p=0.604 n=9+10) MakeMap/[Byte]Byte-16 58.5ns ± 1% 58.5ns ± 1% ~ (p=0.780 n=10+9) MakeMap/[Int]Int-16 113ns ± 0% 113ns ± 1% ~ (p=0.100 n=8+10) NewEmptyMap-16 2.47ns ± 0% 2.47ns ± 0% ~ (p=0.638 n=10+10) NewSmallMap-16 11.5ns ± 1% 11.6ns ± 0% +1.18% (p=0.000 n=10+10) MapIter-16 42.2ns ± 0% 42.8ns ± 1% +1.50% (p=0.000 n=10+10) MapIterEmpty-16 1.85ns ± 0% 1.85ns ± 0% ~ (p=0.651 n=10+10) SameLengthMap-16 1.85ns ± 1% 1.85ns ± 0% ~ (p=0.247 n=10+10) BigKeyMap-16 7.18ns ± 1% 7.42ns ± 4% +3.33% (p=0.004 n=10+10) BigValMap-16 7.03ns ± 2% 7.19ns ± 1% +2.33% (p=0.000 n=10+9) SmallKeyMap-16 5.32ns ± 1% 5.24ns ± 1% -1.41% (p=0.000 n=10+10) MapPopulate/1-16 6.30ns ± 0% 6.41ns ± 1% +1.81% (p=0.000 n=8+10) MapPopulate/10-16 239ns ± 2% 234ns ± 2% -2.05% (p=0.001 n=9+10) MapPopulate/100-16 4.19µs ± 2% 4.22µs ± 2% ~ (p=0.171 n=10+10) MapPopulate/1000-16 52.3µs ± 1% 52.5µs ± 1% ~ (p=0.133 n=9+10) MapPopulate/10000-16 459µs ± 1% 466µs ± 2% +1.45% (p=0.005 n=10+10) MapPopulate/100000-16 4.22ms ± 2% 4.25ms ± 2% ~ (p=0.393 n=10+10) ComplexAlgMap-16 12.5ns ± 1% 12.4ns ± 1% -0.95% (p=0.022 n=10+10) GoMapClear/Reflexive/1-16 9.61ns ± 1% 9.58ns ± 0% -0.27% (p=0.027 n=10+10) GoMapClear/Reflexive/10-16 10.0ns ± 1% 10.0ns ± 1% ~ (p=0.648 n=9+9) GoMapClear/Reflexive/100-16 31.4ns ± 0% 31.4ns ± 1% ~ (p=0.305 n=9+10) GoMapClear/Reflexive/1000-16 147ns ± 0% 149ns ± 2% +1.21% (p=0.000 n=10+10) GoMapClear/Reflexive/10000-16 3.99µs ± 0% 4.00µs ± 0% +0.21% (p=0.018 n=9+10) GoMapClear/NonReflexive/1-16 41.4ns ± 2% 41.7ns ± 1% +0.55% (p=0.043 n=9+10) GoMapClear/NonReflexive/10-16 50.3ns ± 1% 50.9ns ± 1% +1.16% (p=0.000 n=10+10) GoMapClear/NonReflexive/100-16 125ns ± 0% 126ns ± 0% +0.96% (p=0.000 n=8+10) GoMapClear/NonReflexive/1000-16 1.08µs ± 0% 1.08µs ± 1% ~ (p=0.097 n=10+10) GoMapClear/NonReflexive/10000-16 8.18µs ± 2% 8.10µs ± 0% -0.91% (p=0.019 n=10+8) MapStringConversion/32/simple-16 4.66ns ± 1% 4.69ns ± 3% ~ (p=0.905 n=9+10) MapStringConversion/32/struct-16 4.65ns ± 3% 4.94ns ± 2% +6.23% (p=0.000 n=10+10) MapStringConversion/32/array-16 4.69ns ± 3% 4.72ns ± 3% ~ (p=0.631 n=10+10) MapStringConversion/64/simple-16 4.14ns ± 0% 4.14ns ± 1% ~ (p=0.342 n=10+10) MapStringConversion/64/struct-16 4.13ns ± 0% 4.13ns ± 0% ~ (p=0.809 n=10+10) MapStringConversion/64/array-16 4.13ns ± 1% 4.13ns ± 1% ~ (p=0.752 n=10+10) MapInterfaceString-16 7.90ns ±23% 8.51ns ±33% ~ (p=0.604 n=9+10) MapInterfacePtr-16 7.68ns ±29% 7.10ns ±36% ~ (p=0.353 n=10+10) NewEmptyMapHintLessThan8-16 3.70ns ± 0% 3.70ns ± 0% ~ (p=0.209 n=10+10) NewEmptyMapHintGreaterThan8-16 270ns ± 1% 272ns ± 1% +0.71% (p=0.005 n=10+9) MapPop100-16 6.45µs ± 0% 6.50µs ± 1% +0.77% (p=0.000 n=10+10) MapPop1000-16 114µs ± 1% 114µs ± 1% ~ (p=0.190 n=10+10) MapPop10000-16 2.28ms ± 2% 2.28ms ± 2% ~ (p=0.912 n=10+10) MapAssign/Int32/256-16 4.75ns ± 2% 4.82ns ± 4% ~ (p=0.101 n=10+10) MapAssign/Int32/65536-16 16.4ns ± 1% 16.7ns ± 0% +1.44% (p=0.000 n=10+9) MapAssign/Int64/256-16 4.79ns ± 5% 4.79ns ± 1% ~ (p=0.616 n=10+8) MapAssign/Int64/65536-16 17.1ns ± 1% 16.8ns ± 0% -1.28% (p=0.000 n=10+8) MapAssign/Str/256-16 6.07ns ± 6% 6.24ns ± 2% +2.84% (p=0.035 n=10+9) MapAssign/Str/65536-16 21.4ns ± 0% 21.4ns ± 3% ~ (p=0.300 n=7+10) MapOperatorAssign/Int32/256-16 4.82ns ± 3% 4.81ns ± 3% ~ (p=0.684 n=10+10) MapOperatorAssign/Int32/65536-16 16.8ns ± 1% 16.5ns ± 1% -1.68% (p=0.000 n=9+10) MapOperatorAssign/Int64/256-16 4.74ns ± 1% 4.77ns ± 3% ~ (p=0.563 n=10+9) MapOperatorAssign/Int64/65536-16 16.9ns ± 1% 17.2ns ± 1% +1.88% (p=0.000 n=10+10) MapOperatorAssign/Str/256-16 1.09µs ± 1% 1.10µs ± 2% ~ (p=0.210 n=10+10) MapOperatorAssign/Str/65536-16 184ns ± 9% 184ns ± 8% ~ (p=0.922 n=10+9) MapAppendAssign/Int32/256-16 13.8ns ±10% 14.4ns ±11% ~ (p=0.190 n=10+10) MapAppendAssign/Int32/65536-16 28.9ns ± 5% 30.7ns ± 6% +6.13% (p=0.001 n=9+10) MapAppendAssign/Int64/256-16 14.5ns ±12% 13.8ns ± 8% -5.02% (p=0.037 n=10+10) MapAppendAssign/Int64/65536-16 30.9ns ± 1% 30.4ns ± 2% -1.56% (p=0.001 n=10+10) MapAppendAssign/Str/256-16 30.2ns ± 6% 30.0ns ±10% ~ (p=0.645 n=10+10) MapAppendAssign/Str/65536-16 44.5ns ± 4% 46.8ns ± 3% +5.17% (p=0.001 n=8+9) MapDelete/Int32/100-16 18.7ns ± 0% 18.7ns ± 0% -0.27% (p=0.017 n=10+10) MapDelete/Int32/1000-16 17.6ns ± 1% 17.5ns ± 1% -0.85% (p=0.000 n=9+10) MapDelete/Int32/10000-16 18.7ns ± 0% 18.3ns ± 1% -1.92% (p=0.000 n=10+10) MapDelete/Int64/100-16 19.1ns ± 0% 19.2ns ± 0% +0.68% (p=0.000 n=10+9) MapDelete/Int64/1000-16 17.7ns ± 2% 18.3ns ± 1% +3.00% (p=0.000 n=10+10) MapDelete/Int64/10000-16 18.8ns ± 1% 19.2ns ± 0% +2.01% (p=0.000 n=10+9) MapDelete/Str/100-16 26.5ns ± 0% 26.4ns ± 1% -0.73% (p=0.000 n=10+10) MapDelete/Str/1000-16 23.5ns ± 2% 23.4ns ± 1% ~ (p=0.425 n=10+10) MapDelete/Str/10000-16 25.1ns ± 0% 25.1ns ± 1% +0.28% (p=0.037 n=10+10) MapDelete/Pointer/100-16 20.6ns ± 1% 20.6ns ± 0% ~ (p=0.117 n=10+10) MapDelete/Pointer/1000-16 19.2ns ± 1% 19.4ns ± 1% +0.97% (p=0.004 n=10+10) MapDelete/Pointer/10000-16 20.0ns ± 0% 20.1ns ± 1% +0.52% (p=0.022 n=10+10) Memmove/0-16 0.21ns ± 2% 0.21ns ± 1% ~ (p=0.671 n=10+10) Memmove/1-16 0.93ns ± 0% 0.93ns ± 0% +0.21% (p=0.034 n=10+10) Memmove/2-16 0.93ns ± 0% 0.93ns ± 0% ~ (p=0.101 n=10+10) Memmove/3-16 0.93ns ± 1% 0.93ns ± 1% +0.49% (p=0.004 n=10+10) Memmove/4-16 1.03ns ± 0% 1.03ns ± 0% ~ (p=0.260 n=10+10) Memmove/5-16 1.13ns ± 0% 1.13ns ± 0% +0.20% (p=0.034 n=10+10) Memmove/6-16 1.13ns ± 0% 1.13ns ± 1% ~ (p=0.126 n=10+10) Memmove/7-16 1.13ns ± 0% 1.13ns ± 1% +0.22% (p=0.028 n=10+10) Memmove/8-16 1.13ns ± 0% 1.13ns ± 0% ~ (p=0.545 n=9+10) Memmove/9-16 1.25ns ± 0% 1.35ns ± 0% +7.98% (p=0.000 n=10+10) Memmove/10-16 1.25ns ± 0% 1.35ns ± 0% +7.96% (p=0.000 n=9+9) Memmove/11-16 1.25ns ± 0% 1.35ns ± 0% +8.53% (p=0.000 n=10+9) Memmove/12-16 1.25ns ± 0% 1.35ns ± 1% +8.24% (p=0.000 n=10+10) Memmove/13-16 1.25ns ± 0% 1.34ns ± 0% +7.75% (p=0.000 n=10+10) Memmove/14-16 1.25ns ± 0% 1.35ns ± 1% +8.28% (p=0.000 n=10+9) Memmove/15-16 1.25ns ± 0% 1.35ns ± 0% +8.07% (p=0.000 n=10+9) Memmove/16-16 1.25ns ± 0% 1.35ns ± 1% +8.35% (p=0.000 n=9+10) Memmove/32-16 1.34ns ± 0% 1.36ns ± 1% +1.22% (p=0.000 n=10+10) Memmove/64-16 1.45ns ± 0% 1.64ns ± 0% +13.07% (p=0.000 n=10+9) Memmove/128-16 1.86ns ± 0% 2.02ns ± 0% +8.64% (p=0.000 n=10+10) Memmove/256-16 2.47ns ± 0% 2.49ns ± 1% +1.14% (p=0.000 n=10+10) Memmove/512-16 3.96ns ± 1% 3.96ns ± 0% ~ (p=0.182 n=10+10) Memmove/1024-16 5.90ns ± 1% 5.87ns ± 1% ~ (p=0.258 n=9+9) Memmove/2048-16 9.62ns ± 1% 9.62ns ± 2% ~ (p=0.963 n=8+9) Memmove/4096-16 16.4ns ± 0% 17.1ns ± 4% +4.19% (p=0.003 n=8+9) MemmoveOverlap/32-16 1.62ns ± 1% 1.68ns ± 1% +3.53% (p=0.000 n=10+10) MemmoveOverlap/64-16 1.64ns ± 0% 1.65ns ± 0% +0.29% (p=0.002 n=9+9) MemmoveOverlap/128-16 2.06ns ± 0% 2.06ns ± 0% ~ (p=0.070 n=10+10) MemmoveOverlap/256-16 2.67ns ± 0% 2.67ns ± 0% +0.26% (p=0.012 n=10+10) MemmoveOverlap/512-16 6.20ns ±18% 5.74ns ± 0% ~ (p=0.645 n=10+8) MemmoveOverlap/1024-16 7.28ns ± 0% 7.30ns ± 0% +0.28% (p=0.006 n=8+10) MemmoveOverlap/2048-16 11.9ns ± 0% 12.0ns ± 1% +0.37% (p=0.014 n=9+9) MemmoveOverlap/4096-16 23.3ns ± 1% 23.1ns ± 1% -0.84% (p=0.000 n=8+10) MemmoveUnalignedDst/0-16 1.03ns ± 0% 1.03ns ± 0% +0.19% (p=0.007 n=10+10) MemmoveUnalignedDst/1-16 1.24ns ± 0% 1.25ns ± 1% +0.52% (p=0.022 n=10+10) MemmoveUnalignedDst/2-16 1.23ns ± 0% 1.23ns ± 0% ~ (p=0.051 n=10+10) MemmoveUnalignedDst/3-16 1.23ns ± 0% 1.23ns ± 0% +0.14% (p=0.006 n=9+9) MemmoveUnalignedDst/4-16 1.23ns ± 0% 1.24ns ± 1% +0.37% (p=0.004 n=10+10) MemmoveUnalignedDst/5-16 1.35ns ± 0% 1.35ns ± 0% ~ (p=0.075 n=10+10) MemmoveUnalignedDst/6-16 1.34ns ± 0% 1.34ns ± 0% ~ (p=0.779 n=10+10) MemmoveUnalignedDst/7-16 1.34ns ± 0% 1.34ns ± 0% ~ (p=1.000 n=10+10) MemmoveUnalignedDst/8-16 1.34ns ± 0% 1.35ns ± 1% +0.39% (p=0.024 n=10+10) MemmoveUnalignedDst/9-16 1.44ns ± 0% 1.44ns ± 0% ~ (p=0.849 n=10+10) MemmoveUnalignedDst/10-16 1.44ns ± 0% 1.44ns ± 0% ~ (p=0.255 n=10+10) MemmoveUnalignedDst/11-16 1.44ns ± 0% 1.44ns ± 0% ~ (p=0.304 n=10+10) MemmoveUnalignedDst/12-16 1.44ns ± 0% 1.44ns ± 0% ~ (p=0.672 n=10+10) MemmoveUnalignedDst/13-16 1.44ns ± 0% 1.44ns ± 0% ~ (p=0.435 n=10+10) MemmoveUnalignedDst/14-16 1.44ns ± 0% 1.44ns ± 0% ~ (p=0.340 n=10+10) MemmoveUnalignedDst/15-16 1.44ns ± 0% 1.44ns ± 0% ~ (p=0.911 n=10+9) MemmoveUnalignedDst/16-16 1.44ns ± 0% 1.44ns ± 0% ~ (p=0.074 n=10+10) MemmoveUnalignedDst/32-16 1.62ns ± 0% 1.63ns ± 0% ~ (p=0.059 n=10+10) MemmoveUnalignedDst/64-16 1.65ns ± 0% 1.65ns ± 0% ~ (p=0.234 n=10+10) MemmoveUnalignedDst/128-16 2.06ns ± 0% 2.06ns ± 0% ~ (p=0.709 n=10+9) MemmoveUnalignedDst/256-16 3.69ns ± 0% 3.70ns ± 0% ~ (p=0.144 n=10+10) MemmoveUnalignedDst/512-16 4.15ns ± 1% 4.14ns ± 0% ~ (p=0.778 n=10+8) MemmoveUnalignedDst/1024-16 7.52ns ± 0% 7.53ns ± 1% ~ (p=0.650 n=9+9) MemmoveUnalignedDst/2048-16 12.9ns ± 0% 12.9ns ± 1% ~ (p=0.548 n=8+8) MemmoveUnalignedDst/4096-16 25.4ns ± 0% 25.4ns ± 0% ~ (p=0.947 n=9+9) MemmoveUnalignedDstOverlap/32-16 4.08ns ± 0% 4.09ns ± 0% ~ (p=0.360 n=10+10) MemmoveUnalignedDstOverlap/64-16 4.56ns ± 0% 4.56ns ± 0% ~ (p=0.705 n=10+9) MemmoveUnalignedDstOverlap/128-16 4.67ns ± 0% 4.67ns ± 0% ~ (p=0.397 n=10+10) MemmoveUnalignedDstOverlap/256-16 5.08ns ± 0% 5.08ns ± 0% ~ (p=0.159 n=10+9) MemmoveUnalignedDstOverlap/512-16 8.45ns ± 5% 8.19ns ± 0% -3.10% (p=0.021 n=10+9) MemmoveUnalignedDstOverlap/1024-16 9.55ns ± 0% 9.56ns ± 0% ~ (p=0.221 n=8+8) MemmoveUnalignedDstOverlap/2048-16 14.0ns ± 0% 14.0ns ± 1% ~ (p=0.200 n=10+9) MemmoveUnalignedDstOverlap/4096-16 26.5ns ± 0% 26.5ns ± 0% ~ (p=0.458 n=10+9) MemmoveUnalignedSrc/0-16 1.02ns ± 1% 0.99ns ± 1% -2.67% (p=0.000 n=10+9) MemmoveUnalignedSrc/1-16 1.13ns ± 0% 1.13ns ± 1% -0.25% (p=0.027 n=10+9) MemmoveUnalignedSrc/2-16 1.13ns ± 1% 1.13ns ± 0% -0.28% (p=0.012 n=10+9) MemmoveUnalignedSrc/3-16 1.24ns ± 1% 1.23ns ± 0% -0.25% (p=0.022 n=9+10) MemmoveUnalignedSrc/4-16 1.24ns ± 0% 1.23ns ± 1% ~ (p=0.118 n=9+10) MemmoveUnalignedSrc/5-16 1.34ns ± 0% 1.34ns ± 1% ~ (p=0.564 n=8+10) MemmoveUnalignedSrc/6-16 1.34ns ± 0% 1.34ns ± 0% -0.39% (p=0.000 n=10+10) MemmoveUnalignedSrc/7-16 1.34ns ± 0% 1.34ns ± 0% ~ (p=0.235 n=10+10) MemmoveUnalignedSrc/8-16 1.34ns ± 0% 1.34ns ± 0% -0.37% (p=0.002 n=10+9) MemmoveUnalignedSrc/9-16 1.44ns ± 0% 1.44ns ± 0% ~ (p=0.579 n=10+9) MemmoveUnalignedSrc/10-16 1.44ns ± 0% 1.44ns ± 0% ~ (p=0.534 n=10+9) MemmoveUnalignedSrc/11-16 1.44ns ± 0% 1.44ns ± 1% ~ (p=0.415 n=10+10) MemmoveUnalignedSrc/12-16 1.44ns ± 0% 1.44ns ± 0% ~ (p=0.218 n=10+10) MemmoveUnalignedSrc/13-16 1.44ns ± 0% 1.44ns ± 1% ~ (p=0.693 n=10+10) MemmoveUnalignedSrc/14-16 1.44ns ± 0% 1.44ns ± 0% ~ (p=0.901 n=10+10) MemmoveUnalignedSrc/15-16 1.44ns ± 0% 1.44ns ± 0% ~ (p=0.379 n=10+10) MemmoveUnalignedSrc/16-16 1.44ns ± 1% 1.44ns ± 0% ~ (p=0.538 n=10+10) MemmoveUnalignedSrc/32-16 1.60ns ± 1% 1.60ns ± 0% ~ (p=0.491 n=10+10) MemmoveUnalignedSrc/64-16 1.65ns ± 0% 1.65ns ± 0% ~ (p=0.564 n=10+10) MemmoveUnalignedSrc/128-16 2.09ns ± 0% 2.09ns ± 0% ~ (p=0.497 n=10+9) MemmoveUnalignedSrc/256-16 2.70ns ± 0% 2.78ns ± 1% +2.81% (p=0.000 n=10+10) MemmoveUnalignedSrc/512-16 4.31ns ± 0% 4.30ns ± 0% -0.26% (p=0.031 n=8+9) MemmoveUnalignedSrc/1024-16 7.28ns ± 0% 7.21ns ± 1% -1.05% (p=0.000 n=8+10) MemmoveUnalignedSrc/2048-16 13.0ns ± 0% 13.0ns ± 0% ~ (p=0.180 n=9+8) MemmoveUnalignedSrc/4096-16 25.4ns ± 0% 25.3ns ± 1% ~ (p=0.054 n=10+10) MemmoveUnalignedSrcOverlap/32-16 4.04ns ± 0% 4.06ns ± 0% +0.62% (p=0.000 n=9+10) MemmoveUnalignedSrcOverlap/64-16 4.12ns ± 0% 4.12ns ± 0% ~ (p=0.421 n=10+10) MemmoveUnalignedSrcOverlap/128-16 4.53ns ± 0% 4.52ns ± 0% ~ (p=0.251 n=10+10) MemmoveUnalignedSrcOverlap/256-16 6.17ns ± 0% 6.15ns ± 0% -0.35% (p=0.000 n=10+9) MemmoveUnalignedSrcOverlap/512-16 7.43ns ± 0% 7.44ns ± 0% ~ (p=0.524 n=9+8) MemmoveUnalignedSrcOverlap/1024-16 8.94ns ± 0% 8.94ns ± 0% ~ (p=0.419 n=8+8) MemmoveUnalignedSrcOverlap/2048-16 13.2ns ± 0% 14.5ns ±21% ~ (p=0.107 n=8+10) MemmoveUnalignedSrcOverlap/4096-16 25.6ns ± 0% 25.6ns ± 1% ~ (p=0.650 n=9+9) Memclr/5-16 0.86ns ± 1% 0.86ns ± 2% ~ (p=0.531 n=9+9) Memclr/16-16 1.04ns ± 0% 1.04ns ± 0% +0.32% (p=0.013 n=9+10) Memclr/64-16 1.23ns ± 0% 1.26ns ± 0% +2.28% (p=0.000 n=10+10) Memclr/256-16 2.27ns ± 0% 2.27ns ± 0% ~ (p=0.127 n=10+10) Memclr/4096-16 17.1ns ± 1% 17.3ns ± 0% +0.88% (p=0.000 n=10+10) Memclr/65536-16 821ns ± 0% 822ns ± 0% ~ (p=0.516 n=10+10) Memclr/1M-16 14.1µs ± 1% 14.0µs ± 1% ~ (p=0.516 n=10+10) Memclr/4M-16 86.1µs ± 1% 85.9µs ± 0% ~ (p=0.123 n=10+10) Memclr/8M-16 174µs ± 2% 173µs ± 0% ~ (p=0.408 n=10+8) Memclr/16M-16 385µs ± 4% 387µs ± 0% ~ (p=0.173 n=10+8) Memclr/64M-16 2.18ms ± 0% 2.19ms ± 0% ~ (p=0.113 n=10+9) GoMemclr/5-16 0.82ns ± 0% 0.82ns ± 0% ~ (p=0.346 n=9+10) GoMemclr/16-16 1.02ns ± 0% 1.02ns ± 0% +0.22% (p=0.003 n=10+8) GoMemclr/64-16 1.14ns ± 0% 1.14ns ± 0% ~ (p=0.948 n=10+9) GoMemclr/256-16 2.06ns ± 0% 2.06ns ± 0% ~ (p=0.868 n=10+10) MemclrRange/1K_2K-16 457ns ± 0% 428ns ± 1% -6.38% (p=0.000 n=10+10) MemclrRange/2K_8K-16 1.46µs ± 0% 1.46µs ± 0% ~ (p=0.700 n=10+10) MemclrRange/4K_16K-16 1.16µs ± 0% 1.16µs ± 0% ~ (p=0.567 n=9+10) MemclrRange/160K_228K-16 20.7µs ± 0% 20.7µs ± 0% ~ (p=0.160 n=10+10) ClearFat7-16 0.38ns ± 5% 0.21ns ± 1% -45.79% (p=0.000 n=9+10) ClearFat8-16 0.21ns ± 3% 0.12ns ± 2% -44.16% (p=0.000 n=8+9) ClearFat11-16 0.35ns ± 3% 0.21ns ± 1% -40.46% (p=0.000 n=9+9) ClearFat12-16 0.23ns ± 9% 0.21ns ± 1% -10.23% (p=0.000 n=10+9) ClearFat13-16 0.22ns ± 6% 0.21ns ± 2% -6.53% (p=0.000 n=10+10) ClearFat14-16 0.22ns ± 4% 0.21ns ± 1% -5.97% (p=0.000 n=10+10) ClearFat15-16 0.22ns ± 4% 0.21ns ± 1% -6.96% (p=0.000 n=10+9) ClearFat16-16 0.19ns ± 9% 0.12ns ± 6% -34.89% (p=0.000 n=9+10) ClearFat24-16 0.23ns ± 6% 0.21ns ± 1% -10.26% (p=0.000 n=10+9) ClearFat32-16 0.22ns ± 5% 0.21ns ± 2% -5.31% (p=0.000 n=10+10) ClearFat40-16 0.34ns ± 4% 0.62ns ± 1% +83.00% (p=0.000 n=10+10) ClearFat48-16 0.33ns ± 2% 0.41ns ± 0% +26.71% (p=0.000 n=10+10) ClearFat56-16 0.41ns ± 1% 0.41ns ± 0% ~ (p=0.838 n=10+10) ClearFat64-16 0.41ns ± 0% 0.41ns ± 0% ~ (p=0.178 n=10+8) ClearFat72-16 0.82ns ± 0% 0.82ns ± 0% ~ (p=0.669 n=10+10) ClearFat128-16 1.04ns ± 0% 1.04ns ± 0% ~ (p=0.679 n=10+10) ClearFat256-16 1.86ns ± 0% 1.86ns ± 0% ~ (p=0.066 n=9+10) ClearFat512-16 3.50ns ± 0% 3.50ns ± 0% ~ (p=0.626 n=10+10) ClearFat1024-16 6.79ns ± 0% 6.79ns ± 0% ~ (p=0.986 n=10+10) ClearFat1032-16 13.6ns ± 0% 13.6ns ± 0% +0.13% (p=0.044 n=10+10) ClearFat1040-16 10.3ns ± 0% 10.3ns ± 0% ~ (p=0.175 n=10+9) CopyFat7-16 0.37ns ±13% 0.25ns ± 1% -31.74% (p=0.000 n=10+9) CopyFat8-16 0.17ns ± 1% 0.17ns ± 2% +1.35% (p=0.004 n=9+9) CopyFat11-16 0.26ns ± 1% 0.30ns ± 3% +12.58% (p=0.000 n=9+10) CopyFat12-16 0.28ns ± 2% 0.26ns ± 1% -5.66% (p=0.000 n=9+9) CopyFat13-16 0.26ns ± 0% 0.28ns ± 4% +7.35% (p=0.000 n=8+10) CopyFat14-16 0.29ns ± 6% 0.26ns ± 2% -10.46% (p=0.000 n=10+9) CopyFat15-16 0.26ns ± 1% 0.30ns ± 6% +14.12% (p=0.000 n=8+10) CopyFat16-16 0.21ns ± 1% 0.21ns ± 0% ~ (p=0.426 n=8+8) CopyFat24-16 0.29ns ± 3% 0.25ns ± 1% -12.27% (p=0.000 n=9+10) CopyFat32-16 0.26ns ± 4% 0.29ns ± 4% +11.71% (p=0.000 n=10+10) CopyFat64-16 0.46ns ± 8% 0.42ns ± 1% -8.37% (p=0.002 n=10+10) CopyFat72-16 0.82ns ± 0% 0.82ns ± 0% ~ (p=0.563 n=10+10) CopyFat128-16 1.53ns ± 0% 1.54ns ± 0% +0.62% (p=0.000 n=10+10) CopyFat256-16 2.68ns ± 0% 2.65ns ± 1% -1.23% (p=0.000 n=10+10) CopyFat512-16 4.93ns ± 1% 5.19ns ± 3% +5.16% (p=0.000 n=9+9) CopyFat520-16 6.99ns ± 0% 6.99ns ± 0% ~ (p=0.539 n=10+10) CopyFat1024-16 11.5ns ± 1% 9.8ns ± 1% -14.98% (p=0.000 n=9+10) CopyFat1032-16 13.6ns ± 0% 13.6ns ± 0% ~ (p=0.728 n=10+10) CopyFat1040-16 11.0ns ± 0% 11.1ns ± 0% +0.53% (p=0.000 n=10+10) Issue18740/2byte-16 10.1µs ± 0% 10.1µs ± 0% ~ (p=0.342 n=10+10) Issue18740/4byte-16 2.34µs ± 0% 2.35µs ± 0% +0.30% (p=0.002 n=10+8) Issue18740/8byte-16 1.28µs ± 0% 1.28µs ± 0% +0.32% (p=0.000 n=9+10) Finalizer-16 345µs ± 1% 336µs ± 0% -2.55% (p=0.000 n=10+9) FinalizerRun-16 450ns ± 3% 420ns ± 1% -6.65% (p=0.000 n=10+10) PallocBitsSummarize/Unpacked00-16 2.88ns ± 0% 2.88ns ± 0% ~ (p=0.358 n=10+10) PallocBitsSummarize/UnpackedFFFFFFFFFFFFFFFF-16 15.2ns ± 0% 15.2ns ± 0% ~ (p=0.925 n=10+10) PallocBitsSummarize/UnpackedAA-16 16.4ns ± 0% 16.3ns ± 0% ~ (p=0.113 n=9+9) PallocBitsSummarize/UnpackedAAAAAAAAAAAAAAAA-16 16.5ns ± 0% 16.6ns ± 0% ~ (p=0.238 n=10+10) PallocBitsSummarize/Unpacked80000000AAAAAAAA-16 37.8ns ± 1% 36.4ns ± 0% -3.70% (p=0.000 n=10+9) PallocBitsSummarize/UnpackedAAAAAAAA00000001-16 41.8ns ± 1% 39.9ns ± 0% -4.68% (p=0.000 n=9+10) PallocBitsSummarize/UnpackedBBBBBBBBBBBBBBBB-16 18.3ns ± 0% 18.3ns ± 0% ~ (p=0.781 n=10+10) PallocBitsSummarize/Unpacked80000000BBBBBBBB-16 38.8ns ± 1% 38.1ns ± 0% -1.78% (p=0.000 n=9+10) PallocBitsSummarize/UnpackedBBBBBBBB00000001-16 37.5ns ± 0% 36.1ns ± 1% -3.88% (p=0.000 n=8+10) PallocBitsSummarize/UnpackedCCCCCCCCCCCCCCCC-16 21.8ns ± 0% 21.9ns ± 0% +0.20% (p=0.018 n=10+9) PallocBitsSummarize/Unpacked4444444444444444-16 21.8ns ± 0% 21.9ns ± 0% +0.20% (p=0.029 n=10+9) PallocBitsSummarize/Unpacked4040404040404040-16 26.5ns ± 0% 26.5ns ± 0% -0.24% (p=0.001 n=9+10) PallocBitsSummarize/Unpacked4000400040004000-16 33.4ns ± 1% 31.3ns ± 0% -6.20% (p=0.000 n=9+10) PallocBitsSummarize/Unpacked1000404044CCAAFF-16 36.4ns ± 1% 35.9ns ± 0% -1.50% (p=0.000 n=10+10) FindBitRange64/Pattern00Size2-16 0.34ns ± 1% 0.35ns ± 1% +3.80% (p=0.000 n=10+9) FindBitRange64/Pattern00Size8-16 0.70ns ± 1% 0.70ns ± 0% -0.68% (p=0.000 n=10+10) FindBitRange64/Pattern00Size32-16 0.70ns ± 1% 0.69ns ± 0% -0.86% (p=0.001 n=10+8) FindBitRange64/PatternFFFFFFFFFFFFFFFFSize2-16 0.34ns ± 1% 0.35ns ± 1% +4.45% (p=0.000 n=9+8) FindBitRange64/PatternFFFFFFFFFFFFFFFFSize8-16 1.54ns ± 0% 1.54ns ± 1% ~ (p=0.914 n=9+9) FindBitRange64/PatternFFFFFFFFFFFFFFFFSize32-16 2.78ns ± 0% 2.78ns ± 0% ~ (p=0.295 n=9+10) FindBitRange64/PatternAASize2-16 0.34ns ± 2% 0.35ns ± 2% +4.61% (p=0.000 n=10+10) FindBitRange64/PatternAASize8-16 0.70ns ± 1% 0.70ns ± 1% -0.82% (p=0.005 n=10+10) FindBitRange64/PatternAASize32-16 0.70ns ± 1% 0.70ns ± 0% -0.73% (p=0.003 n=10+9) FindBitRange64/PatternAAAAAAAAAAAAAAAASize2-16 0.34ns ± 2% 0.35ns ± 2% +3.94% (p=0.000 n=10+10) FindBitRange64/PatternAAAAAAAAAAAAAAAASize8-16 0.70ns ± 1% 0.70ns ± 1% -0.67% (p=0.025 n=10+10) FindBitRange64/PatternAAAAAAAAAAAAAAAASize32-16 0.70ns ± 1% 0.70ns ± 1% ~ (p=0.118 n=9+10) FindBitRange64/Pattern80000000AAAAAAAASize2-16 0.34ns ± 1% 0.35ns ± 2% +3.72% (p=0.000 n=10+9) FindBitRange64/Pattern80000000AAAAAAAASize8-16 0.70ns ± 1% 0.70ns ± 0% ~ (p=0.102 n=10+10) FindBitRange64/Pattern80000000AAAAAAAASize32-16 0.70ns ± 1% 0.70ns ± 1% -0.55% (p=0.011 n=10+10) FindBitRange64/PatternAAAAAAAA00000001Size2-16 0.34ns ± 2% 0.35ns ± 1% +3.83% (p=0.000 n=10+9) FindBitRange64/PatternAAAAAAAA00000001Size8-16 0.70ns ± 1% 0.70ns ± 1% ~ (p=0.065 n=10+10) FindBitRange64/PatternAAAAAAAA00000001Size32-16 0.70ns ± 1% 0.70ns ± 1% -0.95% (p=0.002 n=10+10) FindBitRange64/PatternBBBBBBBBBBBBBBBBSize2-16 0.34ns ± 0% 0.35ns ± 1% +4.12% (p=0.000 n=8+10) FindBitRange64/PatternBBBBBBBBBBBBBBBBSize8-16 1.24ns ± 0% 1.23ns ± 0% -0.30% (p=0.002 n=10+9) FindBitRange64/PatternBBBBBBBBBBBBBBBBSize32-16 1.24ns ± 0% 1.24ns ± 0% -0.17% (p=0.023 n=9+10) FindBitRange64/Pattern80000000BBBBBBBBSize2-16 0.34ns ± 1% 0.35ns ± 2% +4.82% (p=0.000 n=9+10) FindBitRange64/Pattern80000000BBBBBBBBSize8-16 1.24ns ± 1% 1.24ns ± 0% ~ (p=0.063 n=10+10) FindBitRange64/Pattern80000000BBBBBBBBSize32-16 1.24ns ± 0% 1.24ns ± 0% ~ (p=0.164 n=9+10) FindBitRange64/PatternBBBBBBBB00000001Size2-16 0.34ns ± 1% 0.35ns ± 1% +4.38% (p=0.000 n=8+10) FindBitRange64/PatternBBBBBBBB00000001Size8-16 1.24ns ± 1% 1.24ns ± 0% ~ (p=0.052 n=10+10) FindBitRange64/PatternBBBBBBBB00000001Size32-16 1.24ns ± 0% 1.23ns ± 0% -0.40% (p=0.000 n=10+10) FindBitRange64/PatternCCCCCCCCCCCCCCCCSize2-16 0.34ns ± 0% 0.35ns ± 2% +3.96% (p=0.000 n=9+10) FindBitRange64/PatternCCCCCCCCCCCCCCCCSize8-16 1.24ns ± 0% 1.23ns ± 0% -0.30% (p=0.000 n=10+9) FindBitRange64/PatternCCCCCCCCCCCCCCCCSize32-16 1.24ns ± 0% 1.24ns ± 1% ~ (p=0.284 n=10+10) FindBitRange64/Pattern4444444444444444Size2-16 0.34ns ± 1% 0.35ns ± 1% +3.91% (p=0.000 n=9+9) FindBitRange64/Pattern4444444444444444Size8-16 0.70ns ± 1% 0.70ns ± 1% ~ (p=0.617 n=10+10) FindBitRange64/Pattern4444444444444444Size32-16 0.70ns ± 1% 0.70ns ± 1% -0.60% (p=0.006 n=10+10) FindBitRange64/Pattern4040404040404040Size2-16 0.34ns ± 2% 0.35ns ± 2% +3.67% (p=0.000 n=10+10) FindBitRange64/Pattern4040404040404040Size8-16 0.70ns ± 2% 0.70ns ± 1% -0.87% (p=0.014 n=10+10) FindBitRange64/Pattern4040404040404040Size32-16 0.70ns ± 1% 0.70ns ± 1% ~ (p=0.256 n=10+10) FindBitRange64/Pattern4000400040004000Size2-16 0.34ns ± 2% 0.35ns ± 3% +4.71% (p=0.000 n=10+10) FindBitRange64/Pattern4000400040004000Size8-16 0.70ns ± 1% 0.70ns ± 1% ~ (p=0.393 n=10+10) FindBitRange64/Pattern4000400040004000Size32-16 0.70ns ± 1% 0.70ns ± 1% -0.86% (p=0.014 n=10+10) NetpollBreak-16 1.49µs ± 1% 1.50µs ± 3% ~ (p=0.181 n=8+10) Syscall-16 3.68ns ± 1% 3.66ns ± 2% ~ (p=0.148 n=10+10) SyscallWork-16 5.15ns ± 1% 5.13ns ± 0% ~ (p=0.188 n=10+9) SyscallExcess-16 3.89ns ± 2% 3.83ns ± 1% -1.52% (p=0.001 n=10+10) SyscallExcessWork-16 5.34ns ± 1% 5.31ns ± 0% -0.64% (p=0.000 n=10+9) PingPongHog-16 397ns ± 7% 394ns ±11% ~ (p=0.912 n=10+10) StackGrowth-16 67.9ns ± 0% 68.8ns ± 0% +1.28% (p=0.000 n=10+8) StackGrowthDeep-16 7.70µs ± 1% 8.48µs ± 2% +10.06% (p=0.000 n=9+10) CreateGoroutines-16 124ns ± 1% 124ns ± 1% ~ (p=0.254 n=10+10) CreateGoroutinesParallel-16 25.7ns ± 1% 27.6ns ± 2% +7.51% (p=0.000 n=10+10) CreateGoroutinesCapture-16 823ns ± 1% 821ns ± 2% ~ (p=0.699 n=10+10) CreateGoroutinesSingle-16 175ns ± 3% 172ns ± 3% -1.90% (p=0.011 n=10+10) ClosureCall-16 0.11ns ± 7% 0.12ns ± 3% ~ (p=0.842 n=9+10) WakeupParallelSpinning/0s-16 11.4µs ± 0% 11.4µs ± 0% ~ (p=0.325 n=9+10) WakeupParallelSpinning/1µs-16 15.4µs ± 0% 15.4µs ± 1% ~ (p=0.955 n=10+10) WakeupParallelSpinning/2µs-16 18.7µs ± 2% 18.9µs ± 2% ~ (p=0.052 n=10+10) WakeupParallelSpinning/5µs-16 30.7µs ± 0% 30.7µs ± 0% -0.03% (p=0.003 n=10+10) WakeupParallelSpinning/10µs-16 48.8µs ± 0% 48.8µs ± 0% ~ (p=0.670 n=10+10) WakeupParallelSpinning/20µs-16 90.8µs ± 0% 90.8µs ± 0% -0.02% (p=0.004 n=10+10) WakeupParallelSpinning/50µs-16 211µs ± 0% 211µs ± 0% ~ (p=0.194 n=10+10) WakeupParallelSpinning/100µs-16 323µs ± 0% 323µs ± 0% ~ (p=1.000 n=10+9) WakeupParallelSyscall/0s-16 118µs ± 0% 118µs ± 0% ~ (p=0.447 n=10+9) WakeupParallelSyscall/1µs-16 119µs ± 2% 119µs ± 1% ~ (p=0.604 n=10+9) WakeupParallelSyscall/2µs-16 120µs ± 1% 121µs ± 3% ~ (p=0.263 n=8+10) WakeupParallelSyscall/5µs-16 126µs ± 2% 126µs ± 2% ~ (p=0.510 n=10+9) WakeupParallelSyscall/10µs-16 136µs ± 1% 137µs ± 1% ~ (p=0.095 n=9+10) WakeupParallelSyscall/20µs-16 156µs ± 2% 157µs ± 3% ~ (p=0.604 n=10+9) WakeupParallelSyscall/50µs-16 221µs ± 1% 220µs ± 1% ~ (p=0.063 n=10+10) WakeupParallelSyscall/100µs-16 326µs ± 0% 325µs ± 0% -0.26% (p=0.003 n=9+10) Matmult-16 0.67ns ± 2% 0.66ns ± 2% ~ (p=0.256 n=10+10) Fastrand-16 0.08ns ±11% 0.08ns ±13% ~ (p=0.661 n=9+10) Fastrand64-16 0.08ns ±11% 0.08ns ± 6% ~ (p=0.631 n=10+10) FastrandHashiter-16 1.76ns ± 1% 1.76ns ± 1% ~ (p=0.854 n=8+8) Fastrandn/2-16 0.86ns ± 1% 0.86ns ± 1% +1.09% (p=0.000 n=10+9) Fastrandn/3-16 0.85ns ± 1% 0.86ns ± 1% +1.23% (p=0.001 n=10+10) Fastrandn/4-16 0.85ns ± 1% 0.87ns ± 2% +1.60% (p=0.000 n=10+10) Fastrandn/5-16 0.85ns ± 1% 0.86ns ± 1% +1.05% (p=0.000 n=10+10) IfaceCmp100-16 46.6ns ± 0% 46.1ns ± 0% -1.18% (p=0.000 n=10+10) IfaceCmpNil100-16 26.8ns ± 0% 26.8ns ± 0% ~ (p=0.777 n=10+8) EfaceCmpDiff-16 132ns ± 0% 130ns ± 0% -0.95% (p=0.000 n=10+9) EfaceCmpDiffIndirect-16 209ns ± 0% 211ns ± 0% +1.14% (p=0.000 n=10+9) Defer-16 3.40ns ± 1% 3.04ns ± 0% -10.67% (p=0.000 n=10+10) Defer10-16 29.4ns ± 2% 27.2ns ± 3% -7.26% (p=0.000 n=10+10) DeferMany-16 110ns ± 6% 113ns ± 2% +3.45% (p=0.017 n=9+9) PanicRecover-16 67.6ns ± 0% 67.7ns ± 2% ~ (p=0.436 n=9+9) GoroutineProfile/small-nil/idle-16 3.90µs ± 4% 3.86µs ± 2% ~ (p=0.305 n=10+9) GoroutineProfile/small-nil/loaded-16 4.82µs ± 6% 4.82µs ± 4% ~ (p=0.905 n=10+9) GoroutineProfile/small/idle-16 103µs ± 3% 102µs ± 3% ~ (p=0.113 n=9+9) GoroutineProfile/small/loaded-16 432µs ± 5% 440µs ±13% ~ (p=0.604 n=9+10) GoroutineProfile/large-nil/idle-16 3.86µs ± 3% 3.82µs ± 3% ~ (p=0.210 n=10+10) GoroutineProfile/large-nil/loaded-16 4.90µs ± 2% 4.90µs ± 5% ~ (p=0.780 n=10+9) GoroutineProfile/large/idle-16 2.58ms ± 1% 2.52ms ± 1% -2.38% (p=0.000 n=10+10) GoroutineProfile/large/loaded-16 8.62ms ± 9% 8.90ms ±11% ~ (p=0.400 n=9+10) GoroutineProfile/sparse-nil/idle-16 3.85µs ± 4% 3.81µs ± 3% ~ (p=0.470 n=10+10) GoroutineProfile/sparse-nil/loaded-16 4.82µs ± 4% 4.69µs ± 5% ~ (p=0.052 n=10+10) GoroutineProfile/sparse/idle-16 102µs ± 4% 102µs ± 2% ~ (p=0.497 n=10+9) GoroutineProfile/sparse/loaded-16 438µs ± 7% 437µs ± 6% ~ (p=0.796 n=10+10) RWMutexUncontended-16 6.79ns ± 0% 6.78ns ± 0% ~ (p=0.228 n=10+8) RWMutexWrite100-16 85.4ns ± 0% 87.1ns ± 0% +2.00% (p=0.000 n=10+8) RWMutexWrite10-16 168ns ±25% 152ns ±11% ~ (p=0.063 n=10+10) RWMutexWorkWrite100-16 106ns ± 0% 106ns ± 3% ~ (p=0.136 n=10+10) RWMutexWorkWrite10-16 567ns ± 3% 571ns ± 1% ~ (p=0.326 n=10+9) SemTable/OneAddrCollision/n=1000-16 15.9µs ± 1% 16.0µs ± 1% +0.50% (p=0.031 n=9+9) SemTable/ManyAddrCollision/n=1000-16 56.2µs ± 1% 56.8µs ± 1% +1.06% (p=0.000 n=10+10) SemTable/OneAddrCollision/n=2000-16 32.6µs ± 2% 32.9µs ± 4% ~ (p=0.156 n=10+9) SemTable/ManyAddrCollision/n=2000-16 118µs ± 0% 119µs ± 0% +0.75% (p=0.000 n=9+10) SemTable/OneAddrCollision/n=4000-16 65.3µs ± 1% 65.6µs ± 3% ~ (p=0.497 n=9+10) SemTable/ManyAddrCollision/n=4000-16 245µs ± 0% 248µs ± 2% +1.36% (p=0.000 n=9+10) SemTable/OneAddrCollision/n=8000-16 131µs ± 1% 130µs ± 1% -1.01% (p=0.002 n=9+10) SemTable/ManyAddrCollision/n=8000-16 503µs ± 1% 508µs ± 0% +0.97% (p=0.000 n=10+10) MakeSliceCopy/mallocmove/Byte-16 67.6ns ± 1% 64.1ns ± 2% -5.20% (p=0.000 n=10+10) MakeSliceCopy/mallocmove/Int-16 65.0ns ± 7% 61.7ns ± 4% -5.08% (p=0.009 n=10+10) MakeSliceCopy/mallocmove/Ptr-16 88.1ns ± 1% 79.9ns ± 1% -9.29% (p=0.000 n=10+10) MakeSliceCopy/makecopy/Byte-16 65.2ns ± 6% 63.4ns ± 0% ~ (p=0.500 n=10+8) MakeSliceCopy/makecopy/Int-16 63.2ns ± 1% 64.1ns ± 1% +1.34% (p=0.001 n=9+9) MakeSliceCopy/makecopy/Ptr-16 88.1ns ± 1% 80.1ns ± 1% -9.09% (p=0.000 n=10+10) MakeSliceCopy/nilappend/Byte-16 69.8ns ± 1% 65.7ns ± 3% -5.80% (p=0.000 n=10+10) MakeSliceCopy/nilappend/Int-16 69.6ns ± 2% 67.2ns ± 1% -3.50% (p=0.000 n=10+9) MakeSliceCopy/nilappend/Ptr-16 91.5ns ± 1% 83.8ns ± 1% -8.42% (p=0.000 n=9+10) MakeSlice/Byte-16 6.64ns ± 3% 6.58ns ± 2% ~ (p=0.393 n=10+10) MakeSlice/Int16-16 8.60ns ± 1% 8.38ns ± 3% -2.48% (p=0.001 n=9+10) MakeSlice/Int-16 17.7ns ± 3% 16.9ns ± 1% -4.67% (p=0.000 n=10+9) MakeSlice/Ptr-16 24.0ns ± 3% 23.3ns ± 2% -3.25% (p=0.000 n=10+9) MakeSlice/Struct/24-16 34.1ns ± 1% 32.0ns ± 1% -6.11% (p=0.000 n=10+10) MakeSlice/Struct/32-16 39.1ns ± 4% 38.2ns ± 1% ~ (p=0.829 n=10+8) MakeSlice/Struct/40-16 47.0ns ± 5% 43.0ns ± 2% -8.55% (p=0.000 n=10+9) GrowSlice/Byte-16 15.3ns ± 3% 15.0ns ± 2% -1.75% (p=0.005 n=9+9) GrowSlice/Int16-16 18.9ns ± 2% 18.4ns ± 2% -2.71% (p=0.000 n=10+9) GrowSlice/Int-16 33.9ns ± 1% 32.2ns ± 1% -4.89% (p=0.000 n=10+9) GrowSlice/Ptr-16 45.3ns ± 2% 43.5ns ± 1% -4.12% (p=0.000 n=10+10) GrowSlice/Struct/24-16 61.9ns ± 2% 60.0ns ± 4% -3.10% (p=0.002 n=10+10) GrowSlice/Struct/32-16 79.9ns ± 2% 72.3ns ± 3% -9.58% (p=0.000 n=8+10) GrowSlice/Struct/40-16 97.1ns ± 7% 88.8ns ± 5% -8.49% (p=0.000 n=10+10) ExtendSlice/IntSlice-16 21.1ns ± 2% 20.3ns ± 2% -3.71% (p=0.000 n=10+10) ExtendSlice/PointerSlice-16 26.8ns ± 2% 26.3ns ± 2% -1.86% (p=0.004 n=10+10) ExtendSlice/NoGrow-16 1.23ns ± 0% 1.30ns ± 1% +5.03% (p=0.000 n=10+10) Append-16 4.58ns ± 1% 4.53ns ± 0% -1.11% (p=0.000 n=10+10) AppendGrowByte-16 1.46ms ± 8% 1.42ms ± 7% -3.24% (p=0.035 n=10+10) AppendGrowString-16 27.8ms ± 4% 27.2ms ± 5% ~ (p=0.052 n=10+10) AppendSlice/1Bytes-16 1.03ns ± 1% 1.04ns ± 1% ~ (p=0.303 n=10+10) AppendSlice/4Bytes-16 1.04ns ± 0% 1.05ns ± 0% +0.79% (p=0.000 n=9+10) AppendSlice/7Bytes-16 1.23ns ± 1% 1.24ns ± 0% +0.45% (p=0.001 n=10+10) AppendSlice/8Bytes-16 1.24ns ± 0% 1.24ns ± 0% ~ (p=0.183 n=10+10) AppendSlice/15Bytes-16 1.37ns ± 1% 1.43ns ± 1% +3.88% (p=0.000 n=10+10) AppendSlice/16Bytes-16 1.37ns ± 1% 1.42ns ± 1% +3.63% (p=0.000 n=9+10) AppendSlice/32Bytes-16 1.44ns ± 0% 1.47ns ± 1% +1.83% (p=0.000 n=10+10) AppendSliceLarge/1024Bytes-16 257ns ± 2% 234ns ± 1% -8.96% (p=0.000 n=8+9) AppendSliceLarge/4096Bytes-16 871ns ± 6% 812ns ± 1% -6.80% (p=0.000 n=10+10) AppendSliceLarge/16384Bytes-16 3.15µs ± 6% 3.04µs ± 5% ~ (p=0.052 n=10+10) AppendSliceLarge/65536Bytes-16 10.7µs ± 7% 10.8µs ± 2% ~ (p=0.278 n=10+9) AppendSliceLarge/262144Bytes-16 42.9µs ± 1% 39.6µs ± 5% -7.75% (p=0.000 n=9+10) AppendSliceLarge/1048576Bytes-16 147µs ± 4% 144µs ± 4% -2.21% (p=0.035 n=10+10) AppendStr/1Bytes-16 1.20ns ± 0% 1.20ns ± 0% ~ (p=0.755 n=10+10) AppendStr/4Bytes-16 1.13ns ± 0% 1.14ns ± 1% +1.20% (p=0.000 n=10+10) AppendStr/8Bytes-16 1.24ns ± 0% 1.25ns ± 0% +0.93% (p=0.000 n=10+10) AppendStr/16Bytes-16 1.40ns ± 0% 1.42ns ± 0% +2.10% (p=0.000 n=9+10) AppendStr/32Bytes-16 1.44ns ± 0% 1.45ns ± 0% +0.99% (p=0.000 n=10+10) AppendSpecialCase-16 8.64ns ± 1% 8.89ns ± 2% +2.90% (p=0.000 n=10+10) Copy/1Byte-16 1.24ns ± 1% 1.24ns ± 0% -0.28% (p=0.000 n=10+6) Copy/1String-16 1.24ns ± 0% 1.23ns ± 0% ~ (p=0.160 n=10+10) Copy/2Byte-16 1.24ns ± 0% 1.24ns ± 0% ~ (p=0.115 n=10+10) Copy/2String-16 1.24ns ± 0% 1.24ns ± 1% ~ (p=0.954 n=10+10) Copy/4Byte-16 1.24ns ± 0% 1.24ns ± 0% -0.44% (p=0.001 n=10+10) Copy/4String-16 1.23ns ± 0% 1.23ns ± 0% ~ (p=0.081 n=10+10) Copy/8Byte-16 1.37ns ± 0% 1.34ns ± 0% -1.79% (p=0.000 n=9+9) Copy/8String-16 1.34ns ± 0% 1.34ns ± 0% -0.58% (p=0.000 n=9+10) Copy/12Byte-16 1.44ns ± 0% 1.44ns ± 0% ~ (p=0.149 n=9+9) Copy/12String-16 1.44ns ± 0% 1.45ns ± 0% ~ (p=0.124 n=9+9) Copy/16Byte-16 1.44ns ± 0% 1.44ns ± 0% -0.19% (p=0.004 n=10+9) Copy/16String-16 1.44ns ± 0% 1.45ns ± 0% +0.30% (p=0.008 n=10+10) Copy/32Byte-16 1.63ns ± 1% 1.62ns ± 1% -0.72% (p=0.002 n=10+10) Copy/32String-16 1.60ns ± 1% 1.64ns ± 0% +2.23% (p=0.000 n=10+10) Copy/128Byte-16 2.06ns ± 0% 2.06ns ± 0% ~ (p=0.757 n=9+10) Copy/128String-16 2.07ns ± 0% 2.07ns ± 0% +0.36% (p=0.004 n=10+10) Copy/1024Byte-16 6.07ns ± 2% 6.00ns ± 1% -1.20% (p=0.000 n=9+10) Copy/1024String-16 6.05ns ± 0% 5.95ns ± 1% -1.54% (p=0.000 n=10+9) AppendInPlace/NoGrow/Byte-16 288ns ± 1% 284ns ± 1% -1.58% (p=0.000 n=10+10) AppendInPlace/NoGrow/1Ptr-16 844ns ± 1% 809ns ± 3% -4.13% (p=0.000 n=9+10) AppendInPlace/NoGrow/2Ptr-16 1.47µs ± 1% 1.46µs ± 1% ~ (p=0.388 n=9+10) AppendInPlace/NoGrow/3Ptr-16 1.87µs ± 7% 1.91µs ± 1% ~ (p=0.166 n=10+8) AppendInPlace/NoGrow/4Ptr-16 2.66µs ± 1% 2.67µs ± 3% ~ (p=0.968 n=9+10) AppendInPlace/Grow/Byte-16 126ns ± 2% 121ns ± 2% -4.06% (p=0.000 n=10+10) AppendInPlace/Grow/1Ptr-16 132ns ± 2% 127ns ± 2% -4.28% (p=0.000 n=10+9) AppendInPlace/Grow/2Ptr-16 196ns ± 2% 188ns ± 1% -4.20% (p=0.000 n=10+8) AppendInPlace/Grow/3Ptr-16 264ns ± 1% 260ns ± 1% -1.51% (p=0.000 n=9+10) AppendInPlace/Grow/4Ptr-16 297ns ± 2% 294ns ± 2% ~ (p=0.085 n=10+10) StackCopyPtr-16 36.4ms ± 2% 36.7ms ± 2% ~ (p=0.481 n=10+10) StackCopy-16 33.9ms ± 3% 32.6ms ± 1% -3.87% (p=0.000 n=10+8) StackCopyNoCache-16 1.00ms ± 5% 1.01ms ± 5% ~ (p=0.143 n=10+10) StackCopyWithStkobj-16 11.0ms ± 3% 10.9ms ± 4% ~ (p=0.579 n=10+10) Issue18138-16 49.2µs ± 5% 49.0µs ± 4% ~ (p=1.000 n=10+9) CompareStringEqual-16 1.39ns ± 1% 1.45ns ± 2% +3.80% (p=0.000 n=8+10) CompareStringIdentical-16 0.55ns ± 1% 0.55ns ± 0% +0.42% (p=0.007 n=10+10) CompareStringSameLength-16 1.03ns ± 0% 1.03ns ± 0% ~ (p=0.430 n=9+10) CompareStringDifferentLength-16 0.11ns ± 2% 0.11ns ± 3% ~ (p=0.139 n=9+10) CompareStringBigUnaligned-16 23.9µs ± 1% 24.0µs ± 1% ~ (p=0.370 n=9+8) CompareStringBig-16 22.0µs ± 3% 22.2µs ± 3% ~ (p=0.243 n=9+10) ConcatStringAndBytes-16 10.7ns ± 1% 10.0ns ± 2% -6.33% (p=0.000 n=10+10) SliceByteToString/1-16 1.34ns ± 0% 1.34ns ± 0% ~ (p=0.057 n=10+10) SliceByteToString/2-16 6.67ns ± 2% 6.60ns ± 3% ~ (p=0.101 n=10+10) SliceByteToString/4-16 7.76ns ± 2% 7.56ns ± 3% -2.59% (p=0.001 n=10+10) SliceByteToString/8-16 9.81ns ± 4% 9.57ns ± 2% -2.48% (p=0.005 n=10+10) SliceByteToString/16-16 14.0ns ± 3% 13.7ns ± 2% -2.31% (p=0.009 n=10+10) SliceByteToString/32-16 17.3ns ± 1% 16.7ns ± 2% -3.41% (p=0.000 n=10+10) SliceByteToString/64-16 25.1ns ± 1% 24.1ns ± 2% -3.93% (p=0.000 n=9+10) SliceByteToString/128-16 38.6ns ± 1% 36.5ns ± 1% -5.60% (p=0.000 n=10+10) RuneCount/lenruneslice/ASCII-16 4.12ns ± 0% 4.11ns ± 0% ~ (p=0.382 n=10+10) RuneCount/lenruneslice/Japanese-16 25.4ns ± 2% 25.6ns ± 2% ~ (p=0.138 n=9+10) RuneCount/lenruneslice/MixedLength-16 17.1ns ± 0% 17.2ns ± 0% +0.59% (p=0.000 n=9+9) RuneCount/rangeloop/ASCII-16 3.30ns ± 1% 3.29ns ± 0% ~ (p=0.267 n=10+10) RuneCount/rangeloop/Japanese-16 20.1ns ± 1% 24.9ns ± 1% +24.31% (p=0.000 n=9+9) RuneCount/rangeloop/MixedLength-16 16.5ns ± 1% 16.7ns ± 1% +1.34% (p=0.000 n=10+10) RuneCount/utf8.RuneCountInString/ASCII-16 5.71ns ± 1% 5.73ns ± 2% ~ (p=0.579 n=10+10) RuneCount/utf8.RuneCountInString/Japanese-16 22.0ns ± 6% 18.4ns ± 3% -16.41% (p=0.000 n=9+10) RuneCount/utf8.RuneCountInString/MixedLength-16 15.0ns ± 1% 14.9ns ± 1% -1.01% (p=0.004 n=9+10) RuneIterate/range/ASCII-16 2.69ns ± 1% 2.72ns ± 0% +0.94% (p=0.026 n=10+9) RuneIterate/range/Japanese-16 24.5ns ± 2% 25.3ns ± 2% +3.23% (p=0.000 n=9+10) RuneIterate/range/MixedLength-16 17.0ns ± 1% 17.1ns ± 1% +0.85% (p=0.000 n=10+10) RuneIterate/range1/ASCII-16 2.70ns ± 1% 2.72ns ± 0% ~ (p=0.058 n=9+9) RuneIterate/range1/Japanese-16 24.1ns ± 2% 25.2ns ± 3% +4.30% (p=0.000 n=10+10) RuneIterate/range1/MixedLength-16 16.9ns ± 1% 17.7ns ± 0% +5.04% (p=0.000 n=10+8) RuneIterate/range2/ASCII-16 2.84ns ± 8% 2.72ns ± 1% -4.28% (p=0.003 n=10+9) RuneIterate/range2/Japanese-16 22.7ns ± 4% 25.2ns ± 3% +10.97% (p=0.000 n=10+10) RuneIterate/range2/MixedLength-16 17.0ns ± 1% 17.2ns ± 0% +0.95% (p=0.000 n=10+10) ArrayEqual-16 0.40ns ± 5% 0.35ns ± 2% -11.83% (p=0.000 n=10+10) Func/Name-16 8.05ns ± 1% 8.09ns ± 1% +0.40% (p=0.025 n=8+10) Func/Entry-16 1.73ns ± 1% 1.66ns ± 1% -3.93% (p=0.000 n=10+10) Func/FileLine-16 27.5ns ± 2% 26.0ns ± 0% -5.50% (p=0.000 n=10+10) [Geo mean] 16.7ns 15.7ns -6.08% name old speed new speed delta SetTypePtr-16 11.0GB/s ± 1% 11.0GB/s ± 3% ~ (p=0.684 n=10+10) SetTypePtr8-16 15.5GB/s ± 0% 15.5GB/s ± 0% ~ (p=0.123 n=10+10) SetTypePtr16-16 31.0GB/s ± 1% 31.1GB/s ± 0% ~ (p=0.123 n=10+10) SetTypePtr32-16 62.1GB/s ± 0% 62.2GB/s ± 0% ~ (p=0.123 n=10+10) SetTypePtr64-16 124GB/s ± 0% 124GB/s ± 0% ~ (p=0.684 n=10+10) SetTypePtr126-16 146GB/s ± 0% 146GB/s ± 0% ~ (p=0.481 n=10+10) SetTypePtr128-16 154GB/s ± 0% 154GB/s ± 0% ~ (p=0.243 n=9+10) SetTypePtrSlice-16 151GB/s ± 1% 151GB/s ± 1% ~ (p=0.497 n=9+10) SetTypeNode1-16 5.82GB/s ± 1% 5.82GB/s ± 0% ~ (p=0.353 n=10+10) SetTypeNode1Slice-16 76.1GB/s ± 1% 77.0GB/s ± 1% +1.19% (p=0.000 n=10+10) SetTypeNode8-16 19.4GB/s ± 0% 19.4GB/s ± 0% ~ (p=0.130 n=8+8) SetTypeNode8Slice-16 113GB/s ± 0% 113GB/s ± 0% ~ (p=0.604 n=10+9) SetTypeNode64-16 76.5GB/s ± 0% 76.5GB/s ± 0% ~ (p=0.190 n=10+10) SetTypeNode64Slice-16 97.8GB/s ± 0% 97.7GB/s ± 0% ~ (p=0.549 n=9+10) SetTypeNode64Dead-16 95.5GB/s ± 0% 95.7GB/s ± 0% ~ (p=0.118 n=10+6) SetTypeNode64DeadSlice-16 112GB/s ± 0% 112GB/s ± 0% ~ (p=0.353 n=10+10) SetTypeNode124-16 146GB/s ± 0% 146GB/s ± 0% ~ (p=0.853 n=10+10) SetTypeNode124Slice-16 146GB/s ± 5% 149GB/s ± 0% ~ (p=0.315 n=10+10) SetTypeNode126-16 154GB/s ± 0% 154GB/s ± 0% ~ (p=0.356 n=10+9) SetTypeNode126Slice-16 150GB/s ± 0% 150GB/s ± 0% ~ (p=0.095 n=9+10) SetTypeNode128-16 107GB/s ± 0% 107GB/s ± 0% +0.31% (p=0.003 n=9+10) SetTypeNode128Slice-16 119GB/s ± 0% 120GB/s ± 0% ~ (p=0.156 n=10+9) SetTypeNode130-16 108GB/s ± 0% 108GB/s ± 0% +0.33% (p=0.002 n=10+10) SetTypeNode130Slice-16 119GB/s ± 0% 119GB/s ± 0% ~ (p=0.739 n=10+10) SetTypeNode1024-16 160GB/s ± 0% 159GB/s ± 1% ~ (p=0.113 n=9+9) SetTypeNode1024Slice-16 144GB/s ± 0% 144GB/s ± 0% ~ (p=0.063 n=10+10) Hash5-16 2.59GB/s ± 1% 2.49GB/s ± 0% -3.90% (p=0.000 n=10+9) Hash16-16 7.85GB/s ± 1% 7.23GB/s ± 1% -7.92% (p=0.000 n=10+10) Hash64-16 24.0GB/s ± 0% 23.9GB/s ± 0% ~ (p=0.190 n=9+9) Hash1024-16 62.4GB/s ± 0% 62.3GB/s ± 0% -0.16% (p=0.017 n=9+10) Hash65536-16 74.0GB/s ± 0% 74.0GB/s ± 0% ~ (p=0.796 n=10+10) Memmove/1-16 1.08GB/s ± 0% 1.08GB/s ± 0% -0.21% (p=0.035 n=10+10) Memmove/2-16 2.16GB/s ± 0% 2.15GB/s ± 0% ~ (p=0.105 n=10+10) Memmove/3-16 3.24GB/s ± 1% 3.22GB/s ± 1% -0.49% (p=0.004 n=10+10) Memmove/4-16 3.89GB/s ± 0% 3.89GB/s ± 0% ~ (p=0.218 n=10+10) Memmove/5-16 4.42GB/s ± 0% 4.42GB/s ± 0% ~ (p=0.075 n=10+10) Memmove/6-16 5.31GB/s ± 0% 5.29GB/s ± 1% ~ (p=0.218 n=10+10) Memmove/7-16 6.19GB/s ± 0% 6.18GB/s ± 0% -0.15% (p=0.035 n=10+9) Memmove/8-16 7.07GB/s ± 0% 7.07GB/s ± 0% ~ (p=0.684 n=10+10) Memmove/9-16 7.22GB/s ± 0% 6.68GB/s ± 0% -7.37% (p=0.000 n=10+10) Memmove/10-16 8.02GB/s ± 0% 7.43GB/s ± 0% -7.38% (p=0.000 n=9+9) Memmove/11-16 8.83GB/s ± 0% 8.13GB/s ± 0% -7.87% (p=0.000 n=10+9) Memmove/12-16 9.62GB/s ± 0% 8.89GB/s ± 1% -7.61% (p=0.000 n=10+10) Memmove/13-16 10.4GB/s ± 0% 9.7GB/s ± 0% -7.20% (p=0.000 n=10+10) Memmove/14-16 11.2GB/s ± 0% 10.4GB/s ± 1% -7.64% (p=0.000 n=10+9) Memmove/15-16 12.0GB/s ± 0% 11.1GB/s ± 0% -7.46% (p=0.000 n=10+9) Memmove/16-16 12.8GB/s ± 0% 11.8GB/s ± 1% -7.67% (p=0.000 n=10+10) Memmove/32-16 23.8GB/s ± 0% 23.5GB/s ± 1% -1.20% (p=0.000 n=10+10) Memmove/64-16 44.2GB/s ± 0% 39.1GB/s ± 0% -11.56% (p=0.000 n=10+9) Memmove/128-16 68.7GB/s ± 0% 63.2GB/s ± 0% -7.95% (p=0.000 n=10+10) Memmove/256-16 104GB/s ± 0% 103GB/s ± 0% -1.13% (p=0.000 n=10+10) Memmove/512-16 129GB/s ± 1% 129GB/s ± 0% ~ (p=0.165 n=10+10) Memmove/1024-16 174GB/s ± 1% 174GB/s ± 1% ~ (p=0.258 n=9+9) Memmove/2048-16 213GB/s ± 1% 213GB/s ± 2% ~ (p=0.963 n=8+9) Memmove/4096-16 250GB/s ± 1% 240GB/s ± 4% -3.83% (p=0.006 n=9+9) MemmoveOverlap/32-16 19.8GB/s ± 1% 19.1GB/s ± 1% -3.40% (p=0.000 n=10+10) MemmoveOverlap/64-16 39.0GB/s ± 0% 38.8GB/s ± 0% -0.28% (p=0.001 n=9+9) MemmoveOverlap/128-16 62.2GB/s ± 0% 62.1GB/s ± 0% ~ (p=0.063 n=10+10) MemmoveOverlap/256-16 96.0GB/s ± 0% 95.8GB/s ± 0% -0.26% (p=0.009 n=10+10) MemmoveOverlap/512-16 83.6GB/s ±16% 89.2GB/s ± 0% ~ (p=0.696 n=10+8) MemmoveOverlap/1024-16 141GB/s ± 0% 140GB/s ± 0% -0.28% (p=0.006 n=8+10) MemmoveOverlap/2048-16 172GB/s ± 0% 171GB/s ± 1% -0.38% (p=0.008 n=9+9) MemmoveOverlap/4096-16 176GB/s ± 1% 177GB/s ± 1% +0.84% (p=0.001 n=8+10) MemmoveUnalignedDst/1-16 806MB/s ± 0% 802MB/s ± 1% -0.52% (p=0.023 n=10+10) MemmoveUnalignedDst/2-16 1.62GB/s ± 0% 1.62GB/s ± 0% -0.11% (p=0.041 n=10+10) MemmoveUnalignedDst/3-16 2.43GB/s ± 0% 2.43GB/s ± 0% -0.14% (p=0.006 n=9+9) MemmoveUnalignedDst/4-16 3.24GB/s ± 0% 3.23GB/s ± 1% -0.36% (p=0.007 n=10+10) MemmoveUnalignedDst/5-16 3.71GB/s ± 0% 3.71GB/s ± 0% ~ (p=0.063 n=10+10) MemmoveUnalignedDst/6-16 4.48GB/s ± 0% 4.47GB/s ± 0% ~ (p=0.912 n=10+10) MemmoveUnalignedDst/7-16 5.22GB/s ± 0% 5.22GB/s ± 0% ~ (p=1.000 n=10+10) MemmoveUnalignedDst/8-16 5.95GB/s ± 0% 5.93GB/s ± 1% -0.40% (p=0.023 n=10+10) MemmoveUnalignedDst/9-16 6.24GB/s ± 0% 6.24GB/s ± 0% ~ (p=0.912 n=10+10) MemmoveUnalignedDst/10-16 6.94GB/s ± 0% 6.94GB/s ± 0% ~ (p=0.353 n=10+10) MemmoveUnalignedDst/11-16 7.64GB/s ± 0% 7.63GB/s ± 0% ~ (p=0.393 n=10+10) MemmoveUnalignedDst/12-16 8.33GB/s ± 0% 8.33GB/s ± 0% ~ (p=0.971 n=10+10) MemmoveUnalignedDst/13-16 9.02GB/s ± 0% 9.01GB/s ± 0% ~ (p=0.436 n=10+10) MemmoveUnalignedDst/14-16 9.71GB/s ± 0% 9.71GB/s ± 0% ~ (p=0.280 n=10+10) MemmoveUnalignedDst/15-16 10.4GB/s ± 0% 10.4GB/s ± 1% ~ (p=0.853 n=10+10) MemmoveUnalignedDst/16-16 11.1GB/s ± 0% 11.1GB/s ± 0% ~ (p=0.089 n=10+10) MemmoveUnalignedDst/32-16 19.7GB/s ± 1% 19.6GB/s ± 0% ~ (p=0.075 n=10+10) MemmoveUnalignedDst/64-16 38.9GB/s ± 0% 38.8GB/s ± 0% ~ (p=0.218 n=10+10) MemmoveUnalignedDst/128-16 62.1GB/s ± 0% 62.1GB/s ± 0% ~ (p=0.549 n=10+9) MemmoveUnalignedDst/256-16 69.4GB/s ± 0% 69.3GB/s ± 0% ~ (p=0.105 n=10+10) MemmoveUnalignedDst/512-16 124GB/s ± 1% 124GB/s ± 0% ~ (p=0.762 n=10+8) MemmoveUnalignedDst/1024-16 136GB/s ± 0% 136GB/s ± 1% ~ (p=0.666 n=9+9) MemmoveUnalignedDst/2048-16 159GB/s ± 0% 159GB/s ± 0% ~ (p=0.574 n=8+8) MemmoveUnalignedDst/4096-16 161GB/s ± 0% 161GB/s ± 0% ~ (p=1.000 n=9+9) MemmoveUnalignedDstOverlap/32-16 7.84GB/s ± 0% 7.83GB/s ± 0% ~ (p=0.353 n=10+10) MemmoveUnalignedDstOverlap/64-16 14.0GB/s ± 0% 14.0GB/s ± 0% ~ (p=0.661 n=10+9) MemmoveUnalignedDstOverlap/128-16 27.4GB/s ± 0% 27.4GB/s ± 0% ~ (p=0.353 n=10+10) MemmoveUnalignedDstOverlap/256-16 50.4GB/s ± 0% 50.4GB/s ± 0% ~ (p=0.156 n=10+9) MemmoveUnalignedDstOverlap/512-16 60.7GB/s ± 4% 62.5GB/s ± 0% +3.07% (p=0.022 n=10+9) MemmoveUnalignedDstOverlap/1024-16 107GB/s ± 0% 107GB/s ± 0% ~ (p=0.234 n=8+8) MemmoveUnalignedDstOverlap/2048-16 146GB/s ± 0% 146GB/s ± 1% ~ (p=0.182 n=10+9) MemmoveUnalignedDstOverlap/4096-16 155GB/s ± 0% 155GB/s ± 0% ~ (p=0.400 n=10+9) MemmoveUnalignedSrc/1-16 882MB/s ± 0% 884MB/s ± 1% +0.24% (p=0.033 n=10+9) MemmoveUnalignedSrc/2-16 1.76GB/s ± 1% 1.77GB/s ± 0% +0.27% (p=0.028 n=10+9) MemmoveUnalignedSrc/3-16 2.43GB/s ± 0% 2.43GB/s ± 0% +0.26% (p=0.027 n=9+10) MemmoveUnalignedSrc/4-16 3.24GB/s ± 0% 3.24GB/s ± 1% ~ (p=0.079 n=9+10) MemmoveUnalignedSrc/5-16 3.73GB/s ± 0% 3.73GB/s ± 1% ~ (p=0.829 n=8+10) MemmoveUnalignedSrc/6-16 4.47GB/s ± 0% 4.49GB/s ± 0% +0.39% (p=0.000 n=10+10) MemmoveUnalignedSrc/7-16 5.22GB/s ± 0% 5.23GB/s ± 0% ~ (p=0.280 n=10+10) MemmoveUnalignedSrc/8-16 5.95GB/s ± 0% 5.98GB/s ± 0% +0.39% (p=0.001 n=10+9) MemmoveUnalignedSrc/9-16 6.24GB/s ± 0% 6.25GB/s ± 0% ~ (p=0.549 n=10+9) MemmoveUnalignedSrc/10-16 6.93GB/s ± 0% 6.94GB/s ± 0% ~ (p=0.604 n=10+9) MemmoveUnalignedSrc/11-16 7.63GB/s ± 0% 7.63GB/s ± 1% ~ (p=0.353 n=10+10) MemmoveUnalignedSrc/12-16 8.32GB/s ± 0% 8.32GB/s ± 0% ~ (p=0.218 n=10+10) MemmoveUnalignedSrc/13-16 9.02GB/s ± 0% 9.00GB/s ± 1% ~ (p=0.684 n=10+10) MemmoveUnalignedSrc/14-16 9.71GB/s ± 0% 9.71GB/s ± 0% ~ (p=0.739 n=10+10) MemmoveUnalignedSrc/15-16 10.4GB/s ± 0% 10.4GB/s ± 0% ~ (p=0.353 n=10+10) MemmoveUnalignedSrc/16-16 11.1GB/s ± 1% 11.1GB/s ± 0% ~ (p=0.579 n=10+10) MemmoveUnalignedSrc/32-16 20.0GB/s ± 1% 20.0GB/s ± 0% ~ (p=0.631 n=10+10) MemmoveUnalignedSrc/64-16 38.8GB/s ± 0% 38.8GB/s ± 0% ~ (p=0.579 n=10+10) MemmoveUnalignedSrc/128-16 61.2GB/s ± 0% 61.2GB/s ± 0% ~ (p=0.780 n=10+9) MemmoveUnalignedSrc/256-16 94.8GB/s ± 0% 92.2GB/s ± 1% -2.73% (p=0.000 n=10+10) MemmoveUnalignedSrc/512-16 119GB/s ± 0% 119GB/s ± 0% +0.26% (p=0.027 n=8+9) MemmoveUnalignedSrc/1024-16 141GB/s ± 0% 142GB/s ± 1% +1.07% (p=0.000 n=8+10) MemmoveUnalignedSrc/2048-16 157GB/s ± 0% 157GB/s ± 0% ~ (p=0.167 n=9+8) MemmoveUnalignedSrc/4096-16 161GB/s ± 0% 162GB/s ± 1% ~ (p=0.063 n=10+10) MemmoveUnalignedSrcOverlap/32-16 7.93GB/s ± 0% 7.88GB/s ± 0% -0.63% (p=0.000 n=9+10) MemmoveUnalignedSrcOverlap/64-16 15.5GB/s ± 0% 15.5GB/s ± 0% ~ (p=0.529 n=10+10) MemmoveUnalignedSrcOverlap/128-16 28.3GB/s ± 0% 28.3GB/s ± 0% ~ (p=0.218 n=10+10) MemmoveUnalignedSrcOverlap/256-16 41.5GB/s ± 0% 41.6GB/s ± 0% +0.35% (p=0.000 n=10+9) MemmoveUnalignedSrcOverlap/512-16 68.9GB/s ± 0% 68.8GB/s ± 0% ~ (p=0.541 n=9+8) MemmoveUnalignedSrcOverlap/1024-16 115GB/s ± 0% 115GB/s ± 0% ~ (p=0.382 n=8+8) MemmoveUnalignedSrcOverlap/2048-16 155GB/s ± 0% 144GB/s ±18% ~ (p=0.101 n=8+10) MemmoveUnalignedSrcOverlap/4096-16 160GB/s ± 0% 160GB/s ± 1% ~ (p=0.605 n=9+9) Memclr/5-16 5.81GB/s ± 1% 5.80GB/s ± 2% ~ (p=0.546 n=9+9) Memclr/16-16 15.5GB/s ± 0% 15.4GB/s ± 0% -0.32% (p=0.008 n=9+10) Memclr/64-16 51.8GB/s ± 0% 50.7GB/s ± 0% -2.22% (p=0.000 n=10+10) Memclr/256-16 113GB/s ± 0% 113GB/s ± 0% ~ (p=0.143 n=10+10) Memclr/4096-16 239GB/s ± 1% 237GB/s ± 0% -0.87% (p=0.000 n=10+10) Memclr/65536-16 79.8GB/s ± 0% 79.7GB/s ± 0% ~ (p=0.529 n=10+10) Memclr/1M-16 74.6GB/s ± 1% 74.7GB/s ± 1% ~ (p=0.529 n=10+10) Memclr/4M-16 48.7GB/s ± 1% 48.8GB/s ± 0% ~ (p=0.123 n=10+10) Memclr/8M-16 48.2GB/s ± 2% 48.6GB/s ± 0% ~ (p=0.408 n=10+8) Memclr/16M-16 43.6GB/s ± 4% 43.3GB/s ± 0% ~ (p=0.173 n=10+8) Memclr/64M-16 30.7GB/s ± 0% 30.7GB/s ± 0% ~ (p=0.113 n=10+9) GoMemclr/5-16 6.07GB/s ± 0% 6.08GB/s ± 0% ~ (p=0.367 n=9+10) GoMemclr/16-16 15.6GB/s ± 0% 15.6GB/s ± 0% -0.22% (p=0.004 n=9+9) GoMemclr/64-16 56.1GB/s ± 0% 56.1GB/s ± 0% ~ (p=0.968 n=10+9) GoMemclr/256-16 125GB/s ± 0% 124GB/s ± 0% ~ (p=0.912 n=10+10) MemclrRange/1K_2K-16 210GB/s ± 0% 224GB/s ± 1% +6.81% (p=0.000 n=10+10) MemclrRange/2K_8K-16 228GB/s ± 0% 228GB/s ± 0% ~ (p=0.684 n=10+10) MemclrRange/4K_16K-16 279GB/s ± 0% 279GB/s ± 0% ~ (p=0.780 n=9+10) MemclrRange/160K_228K-16 80.3GB/s ± 0% 80.2GB/s ± 0% ~ (p=0.165 n=10+10) Copy/1Byte-16 808MB/s ± 1% 810MB/s ± 0% +0.28% (p=0.000 n=10+8) Copy/1String-16 810MB/s ± 0% 811MB/s ± 0% ~ (p=0.105 n=10+10) Copy/2Byte-16 1.62GB/s ± 0% 1.62GB/s ± 0% ~ (p=0.182 n=10+9) Copy/2String-16 1.62GB/s ± 1% 1.62GB/s ± 1% ~ (p=1.000 n=10+10) Copy/4Byte-16 3.22GB/s ± 0% 3.24GB/s ± 0% +0.46% (p=0.000 n=10+10) Copy/4String-16 3.24GB/s ± 0% 3.24GB/s ± 0% ~ (p=0.075 n=10+10) Copy/8Byte-16 5.86GB/s ± 0% 5.96GB/s ± 0% +1.82% (p=0.000 n=9+9) Copy/8String-16 5.95GB/s ± 0% 5.99GB/s ± 0% +0.59% (p=0.000 n=9+10) Copy/12Byte-16 8.32GB/s ± 0% 8.32GB/s ± 0% ~ (p=0.190 n=9+9) Copy/12String-16 8.31GB/s ± 0% 8.29GB/s ± 0% ~ (p=0.068 n=9+10) Copy/16Byte-16 11.1GB/s ± 0% 11.1GB/s ± 0% +0.18% (p=0.003 n=10+9) Copy/16String-16 11.1GB/s ± 0% 11.1GB/s ± 0% -0.31% (p=0.009 n=10+10) Copy/32Byte-16 19.6GB/s ± 1% 19.8GB/s ± 1% +0.72% (p=0.002 n=10+10) Copy/32String-16 20.0GB/s ± 0% 19.5GB/s ± 0% -2.19% (p=0.000 n=10+10) Copy/128Byte-16 62.2GB/s ± 0% 62.1GB/s ± 0% ~ (p=0.661 n=9+10) Copy/128String-16 61.9GB/s ± 0% 61.7GB/s ± 0% -0.35% (p=0.005 n=10+10) Copy/1024Byte-16 169GB/s ± 2% 171GB/s ± 1% +1.21% (p=0.000 n=9+10) Copy/1024String-16 169GB/s ± 0% 172GB/s ± 1% +1.57% (p=0.000 n=10+9) CompareStringBigUnaligned-16 43.8GB/s ± 1% 43.7GB/s ± 1% ~ (p=0.370 n=9+8) CompareStringBig-16 47.6GB/s ± 3% 47.3GB/s ± 3% ~ (p=0.243 n=9+10) [Geo mean] 25.3GB/s 28.0GB/s +10.66% name old p50-ns new p50-ns delta ReadMemStatsLatency-16 98.4k ±37% 112.7k ±64% ~ (p=0.436 n=10+10) ReadMetricsLatency-16 1.69k ± 3% 1.70k ± 2% ~ (p=0.646 n=9+10) GoroutineProfile/small-nil/idle-16 3.75k ± 4% 3.72k ± 1% ~ (p=0.447 n=10+9) GoroutineProfile/small-nil/loaded-16 4.33k ± 3% 4.31k ± 5% ~ (p=0.931 n=9+9) GoroutineProfile/small/idle-16 102k ± 3% 101k ± 4% ~ (p=0.113 n=9+9) GoroutineProfile/small/loaded-16 214k ± 3% 215k ± 6% ~ (p=0.842 n=9+10) GoroutineProfile/large-nil/idle-16 3.70k ± 2% 3.65k ± 2% ~ (p=0.075 n=10+10) GoroutineProfile/large-nil/loaded-16 4.36k ± 3% 4.31k ±10% ~ (p=0.631 n=10+10) GoroutineProfile/large/idle-16 2.56M ± 1% 2.51M ± 1% -2.28% (p=0.000 n=10+10) GoroutineProfile/large/loaded-16 6.77M ± 4% 6.85M ±19% ~ (p=0.536 n=7+10) GoroutineProfile/sparse-nil/idle-16 3.66k ± 1% 3.64k ± 2% ~ (p=0.136 n=9+9) GoroutineProfile/sparse-nil/loaded-16 4.25k ± 5% 4.15k ± 4% ~ (p=0.190 n=10+10) GoroutineProfile/sparse/idle-16 102k ± 4% 101k ± 3% ~ (p=0.447 n=10+9) GoroutineProfile/sparse/loaded-16 216k ± 4% 218k ± 4% ~ (p=0.549 n=9+10) [Geo mean] 35.8k 35.9k +0.35% name old p90-ns new p90-ns delta ReadMemStatsLatency-16 983k ±310% 200k ±34% -79.62% (p=0.034 n=10+8) ReadMetricsLatency-16 4.01k ±35% 3.75k ±17% ~ (p=0.315 n=10+10) GoroutineProfile/small-nil/idle-16 4.21k ± 4% 4.27k ± 8% ~ (p=0.968 n=9+10) GoroutineProfile/small-nil/loaded-16 5.58k ± 8% 5.35k ±12% ~ (p=0.190 n=10+10) GoroutineProfile/small/idle-16 108k ± 6% 107k ± 7% ~ (p=0.497 n=9+10) GoroutineProfile/small/loaded-16 450k ± 5% 432k ± 3% -3.92% (p=0.002 n=9+9) GoroutineProfile/large-nil/idle-16 4.13k ± 7% 4.04k ± 2% ~ (p=0.181 n=10+8) GoroutineProfile/large-nil/loaded-16 5.76k ± 4% 5.67k ± 5% ~ (p=0.190 n=10+10) GoroutineProfile/large/idle-16 2.63M ± 2% 2.58M ± 1% -1.97% (p=0.000 n=10+10) GoroutineProfile/large/loaded-16 16.9M ± 4% 17.0M ± 6% ~ (p=0.661 n=9+10) GoroutineProfile/sparse-nil/idle-16 4.21k ±10% 4.07k ± 7% ~ (p=0.128 n=10+10) GoroutineProfile/sparse-nil/loaded-16 5.55k ± 8% 5.38k ± 6% ~ (p=0.089 n=10+10) GoroutineProfile/sparse/idle-16 106k ± 4% 106k ± 3% ~ (p=0.661 n=10+9) GoroutineProfile/sparse/loaded-16 454k ± 6% 441k ± 6% -2.86% (p=0.043 n=10+10) [Geo mean] 58.4k 51.0k -12.61% name old p99-ns new p99-ns delta ReadMemStatsLatency-16 983k ±310% 200k ±34% -79.62% (p=0.034 n=10+8) ReadMetricsLatency-16 26.6k ±22% 26.6k ±17% ~ (p=0.971 n=10+10) GoroutineProfile/small-nil/idle-16 5.27k ±12% 5.19k ±12% ~ (p=0.579 n=10+10) GoroutineProfile/small-nil/loaded-16 7.28k ± 3% 7.04k ± 9% ~ (p=0.113 n=9+10) GoroutineProfile/small/idle-16 114k ± 6% 113k ± 6% ~ (p=0.604 n=9+10) GoroutineProfile/small/loaded-16 4.84M ±70% 6.06M ±131% ~ (p=0.842 n=9+10) GoroutineProfile/large-nil/idle-16 5.38k ±19% 5.26k ±13% ~ (p=0.912 n=10+10) GoroutineProfile/large-nil/loaded-16 7.38k ± 3% 7.23k ± 4% ~ (p=0.143 n=10+10) GoroutineProfile/large/idle-16 2.79M ± 5% 2.72M ± 3% ~ (p=0.089 n=10+10) GoroutineProfile/large/loaded-16 24.0M ±24% 24.9M ±29% ~ (p=0.684 n=10+10) GoroutineProfile/sparse-nil/idle-16 5.32k ±17% 5.49k ±17% ~ (p=0.684 n=10+10) GoroutineProfile/sparse-nil/loaded-16 7.25k ± 4% 6.97k ± 5% -3.90% (p=0.005 n=9+10) GoroutineProfile/sparse/idle-16 113k ± 5% 112k ± 6% ~ (p=0.631 n=10+10) GoroutineProfile/sparse/loaded-16 4.00M ±66% 4.26M ±65% ~ (p=0.489 n=9+9) [Geo mean] 107k 97k -9.55% name old alloc/op new alloc/op delta NewEmptyMap-16 0.00B 0.00B ~ (all equal) NewSmallMap-16 0.00B 0.00B ~ (all equal) MapPopulate/1-16 0.00B 0.00B ~ (all equal) MapPopulate/10-16 179B ± 0% 179B ± 0% ~ (all equal) MapPopulate/100-16 3.35kB ± 0% 3.35kB ± 0% ~ (p=0.294 n=10+8) MapPopulate/1000-16 53.3kB ± 0% 53.3kB ± 0% ~ (p=1.000 n=8+10) MapPopulate/10000-16 428kB ± 0% 428kB ± 0% ~ (p=0.469 n=10+10) MapPopulate/100000-16 3.62MB ± 0% 3.62MB ± 0% ~ (p=0.888 n=9+10) MapStringConversion/32/simple-16 0.00B 0.00B ~ (all equal) MapStringConversion/32/struct-16 0.00B 0.00B ~ (all equal) MapStringConversion/32/array-16 0.00B 0.00B ~ (all equal) MapStringConversion/64/simple-16 0.00B 0.00B ~ (all equal) MapStringConversion/64/struct-16 0.00B 0.00B ~ (all equal) MapStringConversion/64/array-16 0.00B 0.00B ~ (all equal) NewEmptyMapHintLessThan8-16 0.00B 0.00B ~ (all equal) NewEmptyMapHintGreaterThan8-16 1.15kB ± 0% 1.15kB ± 0% ~ (all equal) MapAppendAssign/Int32/256-16 41.7B ±15% 44.3B ±12% ~ (p=0.106 n=10+10) MapAppendAssign/Int32/65536-16 22.6B ± 6% 23.5B ± 6% +4.19% (p=0.025 n=9+10) MapAppendAssign/Int64/256-16 43.5B ±10% 42.9B ± 7% ~ (p=0.757 n=10+10) MapAppendAssign/Int64/65536-16 24.7B ± 7% 21.8B ± 6% -11.74% (p=0.000 n=10+10) MapAppendAssign/Str/256-16 87.6B ±10% 89.2B ± 9% ~ (p=0.379 n=10+10) MapAppendAssign/Str/65536-16 45.1B ±14% 47.2B ± 8% ~ (p=0.150 n=10+9) CreateGoroutinesCapture-16 144B ± 0% 144B ± 0% ~ (all equal) [Geo mean] 769B 770B +0.21% name old allocs/op new allocs/op delta NewEmptyMap-16 0.00 0.00 ~ (all equal) NewSmallMap-16 0.00 0.00 ~ (all equal) MapPopulate/1-16 0.00 0.00 ~ (all equal) MapPopulate/10-16 1.00 ± 0% 1.00 ± 0% ~ (all equal) MapPopulate/100-16 17.0 ± 0% 17.0 ± 0% ~ (all equal) MapPopulate/1000-16 73.0 ± 0% 73.0 ± 0% ~ (all equal) MapPopulate/10000-16 320 ± 0% 320 ± 0% ~ (p=1.000 n=10+10) MapPopulate/100000-16 4.00k ± 0% 4.00k ± 0% ~ (p=0.753 n=10+10) MapStringConversion/32/simple-16 0.00 0.00 ~ (all equal) MapStringConversion/32/struct-16 0.00 0.00 ~ (all equal) MapStringConversion/32/array-16 0.00 0.00 ~ (all equal) MapStringConversion/64/simple-16 0.00 0.00 ~ (all equal) MapStringConversion/64/struct-16 0.00 0.00 ~ (all equal) MapStringConversion/64/array-16 0.00 0.00 ~ (all equal) NewEmptyMapHintLessThan8-16 0.00 0.00 ~ (all equal) NewEmptyMapHintGreaterThan8-16 1.00 ± 0% 1.00 ± 0% ~ (all equal) MapAppendAssign/Int32/256-16 0.00 0.00 ~ (all equal) MapAppendAssign/Int32/65536-16 0.00 0.00 ~ (all equal) MapAppendAssign/Int64/256-16 0.00 0.00 ~ (all equal) MapAppendAssign/Int64/65536-16 0.00 0.00 ~ (all equal) MapAppendAssign/Str/256-16 0.00 0.00 ~ (all equal) MapAppendAssign/Str/65536-16 0.00 0.00 ~ (all equal) CreateGoroutinesCapture-16 5.00 ± 0% 5.00 ± 0% ~ (all equal) [Geo mean] 26.0 26.0 +0.00% Change-Id: I5fb03e93df8b380e04795afbdcd1c94aeeecacc6 Reviewed-on: https://go-review.googlesource.com/c/go/+/454255 Reviewed-by: Keith Randall <khr@golang.org> Reviewed-by: Keith Randall <khr@google.com> Reviewed-by: Matthew Dempsky <mdempsky@google.com> Run-TryBot: Jakub Ciolek <jakub@ciolek.dev> TryBot-Result: Gopher Robot <gobot@golang.org>
2023-01-31cmd/link: load host archive libc_nonshared.a for -fstack-protectorThan McIntosh
For internal linking, at the point where we finish reading libgcc.a, if the symbol "__stack_chk_local" is still undefined, then read in the host archive libc_nonshared.a as well. Updates #57261. Change-Id: I0b1e485aa50aa7940db8cabcb3b9a7959bf99ce7 Reviewed-on: https://go-review.googlesource.com/c/go/+/456856 Reviewed-by: Cherry Mui <cherryyz@google.com> Run-TryBot: Than McIntosh <thanm@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
2023-01-30reflect,runtime: add Value.ClearCuong Manh Le
Fixes #55002 Change-Id: I7d0f14cc54f67f2769b51d2efafc4ae3714f0e3d Reviewed-on: https://go-review.googlesource.com/c/go/+/457895 Reviewed-by: Keith Randall <khr@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com> Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com> Reviewed-by: Keith Randall <khr@google.com> Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com> TryBot-Result: Gopher Robot <gobot@golang.org>
2023-01-28runtime: remove go119MemoryLimitSupport flagKeith Randall
Change-Id: I207480d991c6242a1610795605c5ec6a3b3c59de Reviewed-on: https://go-review.googlesource.com/c/go/+/463225 Reviewed-by: Keith Randall <khr@google.com> Run-TryBot: Keith Randall <khr@golang.org> Reviewed-by: Michael Knyszek <mknyszek@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
2023-01-28runtime: remove go119ConcurrentGoroutineProfile flagKeith Randall
Change-Id: If7a248374dcb2c276d2d85a4863eb2ed1bc246a4 Reviewed-on: https://go-review.googlesource.com/c/go/+/463226 Run-TryBot: Keith Randall <khr@golang.org> Auto-Submit: Keith Randall <khr@google.com> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Keith Randall <khr@google.com> Reviewed-by: Rhys Hiltner <rhys@justin.tv>
2023-01-28runtime: remove go118UseTimerCreateProfilerKeith Randall
Change-Id: I37b15690fef6ca5354def834b1f6094e133a9fe4 Reviewed-on: https://go-review.googlesource.com/c/go/+/463736 Run-TryBot: Keith Randall <khr@golang.org> Reviewed-by: Rhys Hiltner <rhys@justin.tv> Auto-Submit: Keith Randall <khr@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Keith Randall <khr@google.com> Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
2023-01-26runtime/debug: expand fuzz corpus for FuzzParseBuildInfoRoundTripBryan C. Mills
Updates #51026 Change-Id: Id7af2ffa8c99970274b2a2b12622d986ea105b1b Reviewed-on: https://go-review.googlesource.com/c/go/+/384161 TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Russ Cox <rsc@golang.org> Auto-Submit: Bryan Mills <bcmills@google.com> Run-TryBot: Bryan Mills <bcmills@google.com>
2023-01-26Revert "runtime: use explicit NOFRAME on darwin/amd64"Quim Muntal
This reverts CL 460235. Reason for revert: This breaks darwin 10 and 11 Change-Id: I3c663ebe3b77eba45a006a3ebec5cabe667faa9e Reviewed-on: https://go-review.googlesource.com/c/go/+/463635 Auto-Submit: Quim Muntal <quimmuntal@gmail.com> Run-TryBot: Quim Muntal <quimmuntal@gmail.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Bryan Mills <bcmills@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com>
2023-01-26runtime: use explicit NOFRAME on darwin/amd64qmuntal
This CL marks some darwin assembly functions as NOFRAME to avoid relying on the implicit amd64 NOFRAME heuristic, where NOSPLIT functions without stack were also marked as NOFRAME. Change-Id: I797f3909bcf7f7aad304e4ede820c884231e54f6 Reviewed-on: https://go-review.googlesource.com/c/go/+/460235 Reviewed-by: Cherry Mui <cherryyz@google.com> Run-TryBot: Cherry Mui <cherryyz@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2023-01-25runtime: delete unused cbctxts variable on windows assemblyqmuntal
runtime·cbctxts has been unused since CL 258938, but it was left over. Change-Id: I374ad26e668a36994e41f5d17593b33090bdc644 Reviewed-on: https://go-review.googlesource.com/c/go/+/463119 TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Bryan Mills <bcmills@google.com> Run-TryBot: Quim Muntal <quimmuntal@gmail.com> Reviewed-by: Cherry Mui <cherryyz@google.com>
2023-01-25runtime: mark amd64 runtime·rt0_go as NOFRAMEqmuntal
This CL adds the NOFRAME flag to runtime·rt0_go, which should had been added in CL 459395 but didn't and broke fix windows-amd64-2008. Change-Id: I4583f2034bf114e1f7aaddef9ba505f53536c3eb Reviewed-on: https://go-review.googlesource.com/c/go/+/463120 Run-TryBot: Quim Muntal <quimmuntal@gmail.com> Reviewed-by: Bryan Mills <bcmills@google.com> Auto-Submit: Quim Muntal <quimmuntal@gmail.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Cherry Mui <cherryyz@google.com>
2023-01-25runtime/race: update race_windows_amd64.sysoThan McIntosh
Update race_windows_amd64.syso to latest tsan (V3) runtime. This version of the runtime depends on libsynchronization.a, so to use this syso, you need to also be using a sufficiently up to date version of GCC (notably GCC 5.1, installed on the Go windows builders right now, does not include this library). Updates #48231. Updates #35006. Fixes #49761. Change-Id: Ia1e2b1d8fe7e2c99728150734935a2c522006caa Reviewed-on: https://go-review.googlesource.com/c/go/+/420197 Reviewed-by: Keith Randall <khr@google.com> Run-TryBot: Than McIntosh <thanm@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
2023-01-24runtime/cgo: use //go:build lines in C and assembly filesTobias Klauser
Replace deprecated // +build lines by their respective //go:build line counterpart. Also remove build constraints implied by file name or type. Change-Id: I8d18cd40071ca28d7654da8f0d22841f43729ca6 Reviewed-on: https://go-review.googlesource.com/c/go/+/460538 TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com> Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2023-01-24runtime: use explicit NOFRAME on windows/amd64qmuntal
This CL marks non-leaf nosplit assembly functions as NOFRAME to avoid relying on the implicit amd64 NOFRAME heuristic, where NOSPLIT functions without stack were also marked as NOFRAME. Updates #57302 Updates #40044 Change-Id: Ia4d26f8420dcf2b54528969ffbf40a73f1315d61 Reviewed-on: https://go-review.googlesource.com/c/go/+/459395 Reviewed-by: Cherry Mui <cherryyz@google.com> Run-TryBot: Quim Muntal <quimmuntal@gmail.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2023-01-24runtime: switch AMD64's publicationBarrier to ABIInternalJakub Ciolek
Shrinks a few runtime functions: runtime runtime.mallocgc 2127 -> 2117 (-0.47%) runtime.(*mheap).initSpan 652 -> 639 (-1.99%) runtime.(*mspan).userArenaNextFree 825 -> 808 (-2.06%) file before after Δ % runtime.s 512473 512414 -59 -0.012% total 20843331 20843272 -59 -0.000% Change-Id: Ifaca7abb6db3467b73945fac71496dd7527e6863 Reviewed-on: https://go-review.googlesource.com/c/go/+/462296 Auto-Submit: Keith Randall <khr@golang.org> Run-TryBot: Jakub Ciolek <jakub@ciolek.dev> Reviewed-by: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Keith Randall <khr@golang.org> Reviewed-by: Keith Randall <khr@google.com> Reviewed-by: Keith Randall <khr@golang.org>
2023-01-24runtime: remove unused badsignal2 on windowsqmuntal
This CL removes badsignal2 function, as it is unused on Windows. badsignal2 was originally intended to abort the process when an exception was raised on a non-Go thread, following the same approach as Linux and others. Since it was added, back on https://golang.org/cl/5797068, it has caused several issues on Windows, see #8224 and #50877. That's because we can't know wether the signal is bad or not, as our trap might not be at the end of the exception handler chain. To fix those issues, https://golang.org/cl/104200046 and CL 442896 stopped calling badsignal2, and CL 458135 removed one last incorrect call on amd64 and 386. Change-Id: I5bd31ee2672118ae0f1a2c8b46a1bb0f4893a011 Reviewed-on: https://go-review.googlesource.com/c/go/+/463116 Reviewed-by: Bryan Mills <bcmills@google.com> Run-TryBot: Quim Muntal <quimmuntal@gmail.com> Reviewed-by: Alex Brainman <alex.brainman@gmail.com> Reviewed-by: Cherry Mui <cherryyz@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
2023-01-24runtime: factor out windows sigtrampqmuntal
This CL factors out part of the Windows sigtramp implementation, which was duplicated in all four architectures. The new common code is implemented in Go rather than in assembly, which will make Windows error handling easier to reason and maintain. While here, implement the control flow guard workaround on windows/386, which almost comes for free. Change-Id: I0bf38c28c54793225126e161bd95527a62de05e0 Reviewed-on: https://go-review.googlesource.com/c/go/+/458135 Run-TryBot: Quim Muntal <quimmuntal@gmail.com> Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Alex Brainman <alex.brainman@gmail.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Bryan Mills <bcmills@google.com> Reviewed-by: Michael Pratt <mpratt@google.com>
2023-01-24runtime: run TestVectoredHandlerDontCrashOnLibrary on 386 and arm64qmuntal
This CL updates TestVectoredHandlerDontCrashOnLibrary so it can run on windows/386 and windows/arm64. It still can't run on windows/arm as it does not support c-shared buildmode (see #43800). Change-Id: Id1577687e165e77d27633c632634ecf86e6e9d6f Reviewed-on: https://go-review.googlesource.com/c/go/+/463117 Reviewed-by: Bryan Mills <bcmills@google.com> Run-TryBot: Quim Muntal <quimmuntal@gmail.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Alex Brainman <alex.brainman@gmail.com> Reviewed-by: Cherry Mui <cherryyz@google.com>
2023-01-23runtime,cmd/internal/obj/x86: use TEB TLS slots on windows/i386qmuntal
This CL redesign how we get the TLS pointer on windows/i386. It applies the same changes as done in CL 431775 for windows/amd64. We were previously reading it from the [TEB] arbitrary data slot, located at 0x14(FS), which can only hold 1 TLS pointer. With this CL, we will read the TLS pointer from the TEB TLS slot array, located at 0xE10(GS). The TLS slot array can hold multiple TLS pointers, up to 64, so multiple Go runtimes running on the same thread can coexists with different TLS. Each new TLS slot has to be allocated via [TlsAlloc], which returns the slot index. This index can then be used to get the slot offset from GS with the following formula: 0xE10 + index*4. The slot index is fixed per Go runtime, so we can store it in runtime.tls_g and use it latter on to read/update the TLS pointer. Loading the TLS pointer requires the following asm instructions: MOVQ runtime.tls_g, AX MOVQ AX(FS), AX Notice that this approach will now be implemented in all the supported windows arches. [TEB]: https://en.wikipedia.org/wiki/Win32_Thread_Information_Block [TlsAlloc]: https://learn.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-tlsalloc Change-Id: If4550b0d44694ee6480d4093b851f4991a088b32 Reviewed-on: https://go-review.googlesource.com/c/go/+/454675 Reviewed-by: Michael Pratt <mpratt@google.com> Run-TryBot: Quim Muntal <quimmuntal@gmail.com> Reviewed-by: Cherry Mui <cherryyz@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
2023-01-23runtime: remove duplicate check of work.full in gcMark.j2gg0s
Change-Id: I659669d7259e7cf73f730232cda11d8525a4aabc GitHub-Last-Rev: 5d183e81285aba64f1f76e5bddbe2f0ae012b138 GitHub-Pull-Request: golang/go#57901 Reviewed-on: https://go-review.googlesource.com/c/go/+/462281 Reviewed-by: Cherry Mui <cherryyz@google.com> Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Michael Knyszek <mknyszek@google.com>
2023-01-23internal/abi,runtime: refactor map constants into one placeDavid Chase
Previously TryBot-tested with bucket bits = 4. Also tested locally with bucket bits = 5. This makes it much easier to change the size of map buckets, and hopefully provides pointers to all the code that in some way depends on details of map layout. Change-Id: I9f6669d1eadd02f182d0bc3f959dc5f385fa1683 Reviewed-on: https://go-review.googlesource.com/c/go/+/462115 TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: David Chase <drchase@google.com> Reviewed-by: Austin Clements <austin@google.com>
2023-01-23runtime: use copy as spotted by staticcheckDaniel Martí
Change-Id: Ibffe46bad7d30df9380ba18d49eeb6782406a1aa Reviewed-on: https://go-review.googlesource.com/c/go/+/463115 Reviewed-by: Keith Randall <khr@golang.org> Run-TryBot: Daniel Martí <mvdan@mvdan.cc> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Keith Randall <khr@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com>
2023-01-20runtime/coverage: avoid non-test coverage profiles in test report helperThan McIntosh
When walking through the set of coverage data files generated from a "go test -cover" run, it's possible to encounter pods (clumps of data files) that were generated by a run from an instrumented Go tool (for example, cmd/compile). Add a guard to the test reporting code to ensure that it only processes files created by the currently running test. Fixes #57924. Change-Id: I1bb7dce88305e1088162e3cb1df628486ecee1c1 Reviewed-on: https://go-review.googlesource.com/c/go/+/462756 Reviewed-by: David Chase <drchase@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Cherry Mui <cherryyz@google.com> Run-TryBot: Than McIntosh <thanm@google.com>
2023-01-20cmd/internal/obj/s390x, runtime: fix breakpoint in s390xSrinivas Pokala
Currently runtime.Breakpoint generates SIGSEGV in s390x. The solution to this is add new asm instruction BRRK of type FORMAT_E for the breakpoint exception. Fixes #52103 Change-Id: I8358a56e428849a5d28d5ade141e1d7310bee084 Reviewed-on: https://go-review.googlesource.com/c/go/+/457456 Reviewed-by: Keith Randall <khr@golang.org> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Cherry Mui <cherryyz@google.com> Run-TryBot: Keith Randall <khr@golang.org> Reviewed-by: Keith Randall <khr@google.com>
2023-01-20runtime: remove 104 byte stack guardliu-xuewen
The number 104 appears to date back to the first implementation of split stacks in https://go.googlesource.com/go/+/b987f7a757f53f460973622a36eebb696f9b5060. That change introduces a 104 byte stack guard. it doesn't makes any sense today. Change-Id: I73069f6d1a827653af63e616f0119fbac809882e GitHub-Last-Rev: bcf900059047548c1709c6d4cf4649a96ad85e57 GitHub-Pull-Request: golang/go#56594 Reviewed-on: https://go-review.googlesource.com/c/go/+/448036 TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Cherry Mui <cherryyz@google.com> Run-TryBot: Ian Lance Taylor <iant@golang.org> Reviewed-by: Keith Randall <khr@golang.org> Reviewed-by: Keith Randall <khr@google.com>
2023-01-20all: fix typos in go file commentsMarcel Meyer
This is the second round to look for spelling mistakes. This time the manual sifting of the result list was made easier by filtering out capitalized and camelcase words. grep -r --include '*.go' -E '^// .*$' . | aspell list | grep -E -x '[A-Za-z]{1}[a-z]*' | sort | uniq This PR will be imported into Gerrit with the title and first comment (this text) used to generate the subject and body of the Gerrit change. Change-Id: Ie8a2092aaa7e1f051aa90f03dbaf2b9aaf5664a9 GitHub-Last-Rev: fc2bd6e0c51652f13a7588980f1408af8e6080f5 GitHub-Pull-Request: golang/go#57737 Reviewed-on: https://go-review.googlesource.com/c/go/+/461595 Auto-Submit: Ian Lance Taylor <iant@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com> Run-TryBot: Ian Lance Taylor <iant@google.com> Reviewed-by: Robert Griesemer <gri@google.com>
2023-01-19internal/godebug: export non-default-behavior counters in runtime/metricsRuss Cox
Allow GODEBUG users to report how many times a setting resulted in non-default behavior. Record non-default-behaviors for all existing GODEBUGs. Also rework tests to ensure that runtime is in sync with runtime/metrics.All, and generate docs mechanically from metrics.All. For #56986. Change-Id: Iefa1213e2a5c3f19ea16cd53298c487952ef05a4 Reviewed-on: https://go-review.googlesource.com/c/go/+/453618 TryBot-Result: Gopher Robot <gobot@golang.org> Auto-Submit: Russ Cox <rsc@golang.org> Run-TryBot: Russ Cox <rsc@golang.org> Reviewed-by: Michael Knyszek <mknyszek@google.com>
2023-01-19runtime: replace panic(nil) with panic(new(runtime.PanicNilError))Russ Cox
Long ago we decided that panic(nil) was too unlikely to bother making a special case for purposes of recover. Unfortunately, it has turned out not to be a special case. There are many examples of code in the Go ecosystem where an author has written panic(nil) because they want to panic and don't care about the panic value. Using panic(nil) in this case has the unfortunate behavior of making recover behave as though the goroutine isn't panicking. As a result, code like: func f() { defer func() { if err := recover(); err != nil { log.Fatalf("panicked! %v", err) } }() call1() call2() } looks like it guarantees that call2 has been run any time f returns, but that turns out not to be strictly true. If call1 does panic(nil), then f returns "successfully", having recovered the panic, but without calling call2. Instead you have to write something like: func f() { done := false defer func() { if err := recover(); !done { log.Fatalf("panicked! %v", err) } }() call1() call2() done = true } which defeats nearly the whole point of recover. No one does this, with the result that almost all uses of recover are subtly broken. One specific broken use along these lines is in net/http, which recovers from panics in handlers and sends back an HTTP error. Users discovered in the early days of Go that panic(nil) was a convenient way to jump out of a handler up to the serving loop without sending back an HTTP error. This was a bug, not a feature. Go 1.8 added panic(http.ErrAbortHandler) as a better way to access the feature. Any lingering code that uses panic(nil) to abort an HTTP handler without a failure message should be changed to use http.ErrAbortHandler. Programs that need the old, unintended behavior from net/http or other packages can set GODEBUG=panicnil=1 to stop the run-time error. Uses of recover that want to detect panic(nil) in new programs can check for recover returning a value of type *runtime.PanicNilError. Because the new GODEBUG is used inside the runtime, we can't import internal/godebug, so there is some new machinery to cross-connect those in this CL, to allow a mutable GODEBUG setting. That won't be necessary if we add any other mutable GODEBUG settings in the future. The CL also corrects the handling of defaulted GODEBUG values in the runtime, for #56986. Fixes #25448. Change-Id: I2b39c7e83e4f7aa308777dabf2edae54773e03f5 Reviewed-on: https://go-review.googlesource.com/c/go/+/461956 Reviewed-by: Robert Griesemer <gri@google.com> Run-TryBot: Russ Cox <rsc@golang.org> TryBot-Result: Gopher Robot <gobot@golang.org> Auto-Submit: Russ Cox <rsc@golang.org>
2023-01-19runtime: remove arbitrary GOARCH constraints in finalizer testsBryan C. Mills
These tests were only run on GOARCH=amd64, but the rationale given in CL 11858043 was GC precision on 32-bit platforms. Today, we have far more 64-bit platforms than just amd64, and I believe that GC precision on 32-bit platforms has been substantially improved as well. The GOARCH restriction seems unnecessary. Updates #57166. Updates #5368. Change-Id: I45c608b6fa721012792c96d4ed94a6d772b90210 Reviewed-on: https://go-review.googlesource.com/c/go/+/456120 Run-TryBot: Bryan Mills <bcmills@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Auto-Submit: Bryan Mills <bcmills@google.com> Reviewed-by: Austin Clements <austin@google.com>
2023-01-16runtime: fix performance regression in morestack_noctxt on ppc64Archana R
In the fix for 54332 the MOVD R1, R1 instruction was added to morestack_noctxt function to set the SPWRITE bit. However, the instruction MOVD R1, R1 results in or r1,r1,r1 which is a special instruction on ppc64 architecture as it changes the thread priority and can negatively impact performance in some cases. More details on such similar nops can be found in Power ISA v3.1 Book II on Power ISA Virtual Environment architecture in the chapter on Program Priority Registers and Or instructions. Replacing this by OR R0, R1 has the same affect on setting SPWRITE as needed by the first fix but does not affect thread priority and hence does not cause the degradation in performance Hash65536-64 2.81GB/s ±10% 16.69GB/s ± 0% +494.44% Fixes #57741 Change-Id: Ib912e3716c6afd277994d6c1c5b2891f82225d50 Reviewed-on: https://go-review.googlesource.com/c/go/+/461597 Reviewed-by: Benny Siegert <bsiegert@gmail.com> Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com> Auto-Submit: Benny Siegert <bsiegert@gmail.com> Reviewed-by: Cherry Mui <cherryyz@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
2023-01-11runtime: fix incorrect commentzhengchaopu
Fix incorrect comment for the runtime package. Change-Id: Iab889eff0e9c622afbed959d32b8b5f0ed0bfebf GitHub-Last-Rev: e9587868db36d9dd466f52f7ffc5de09947a6b2f GitHub-Pull-Request: golang/go#57731 Reviewed-on: https://go-review.googlesource.com/c/go/+/461498 Reviewed-by: Keith Randall <khr@golang.org> TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Keith Randall <khr@golang.org> Auto-Submit: Keith Randall <khr@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com> Reviewed-by: Keith Randall <khr@google.com>
2023-01-10cmd/link, runtime: Apple libc atfork workaround take 3Russ Cox
CL 451735 worked around bugs in Apple's atfork handlers by calling notify_is_valid_token and xpc_atfork_child at startup, so that init code that wouldn't be safe in the child process would be warmed up in the parent process instead, but xpc_atfork_child broke use of the xpc library in Go programs, and xpc is internally used by various macOS frameworks (#57263). CL 459175 reverted that change, and then CL 459176 tried a new approach: use __fork, which doesn't call any of the atfork handlers at all. That worked, but an Apple engineer reviewing the change in private email suggests that since __fork is not public API, it should be avoided. The same engineer (with access to the source code for the xpc library) suggests that the breakage in #57263 is caused by xpc_atfork_child marking the library as unusable, expecting an imminent call to exec, and that calling xpc_date_create_from_current instead would do the necessary initialization without marking xpc as unusable. CL 460475 reverted that change, to prepare for this one. This CL goes back to the original “call functions to warm things up” approach, replacing xpc_atfork_child with xpc_date_create_from_current. The CL also updates cmd/link to use OS and SDK version 10.13.0 for x86 macOS binaries, up from 10.9.0, also suggested by the Apple engineer. Combined with the two warmup calls, this makes the fork hangs go away. The minimum macOS version has been 10.13 High Sierra since Go 1.17, so there should be no problem with writing that in the binaries too. Fixes #33565. Fixes #56784. Fixes #57263. Fixes #57577. Change-Id: I20769d9daa1fe9ea930f8009481335f8a14dc21b Reviewed-on: https://go-review.googlesource.com/c/go/+/460476 Auto-Submit: Russ Cox <rsc@golang.org> Run-TryBot: Russ Cox <rsc@golang.org> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Bryan Mills <bcmills@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com>
generated by cgit v1.3 (git 2.53.0) at 2026-04-15 07:43:37 +0000