| Age | Commit message (Collapse) | Author |
|---|
|
This CL avoids allocating in utf16.Decode for code point sequences
with less than 64 elements. It does so by splitting the function in two,
one that can be inlined that preallocates a buffer and the other that
does the heavy-lifting.
The mid-stack inliner will allocate the buffer in the caller stack,
and in many cases this will be enough to avoid the allocation.
unicode/utf16 benchmarks:
name old time/op new time/op delta
DecodeValidASCII-12 60.1ns ± 3% 16.0ns ±20% -73.40% (p=0.000 n=8+10)
DecodeValidJapaneseChars-12 61.3ns ±10% 14.9ns ±39% -75.71% (p=0.000 n=10+10)
name old alloc/op new alloc/op delta
DecodeValidASCII-12 48.0B ± 0% 0.0B -100.00% (p=0.000 n=10+10)
DecodeValidJapaneseChars-12 48.0B ± 0% 0.0B -100.00% (p=0.000 n=10+10)
name old allocs/op new allocs/op delta
DecodeValidASCII-12 1.00 ± 0% 0.00 -100.00% (p=0.000 n=10+10)
DecodeValidJapaneseChars-12 1.00 ± 0% 0.00 -100.00% (p=0.000 n=10+10)
I've also benchmarked os.File.ReadDir with this change applied
to demonstrate that it does make a difference in the caller site, in this
case via syscall.UTF16ToString:
name old time/op new time/op delta
ReadDir-12 592µs ± 8% 620µs ±16% ~ (p=0.280 n=10+10)
name old alloc/op new alloc/op delta
ReadDir-12 30.4kB ± 0% 22.4kB ± 0% -26.10% (p=0.000 n=8+10)
name old allocs/op new allocs/op delta
ReadDir-12 402 ± 0% 272 ± 0% -32.34% (p=0.000 n=10+10)
Change-Id: I65cf5caa3fd3b3a466c0ed837a50a96e975bbe6b
Reviewed-on: https://go-review.googlesource.com/c/go/+/453415
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Quim Muntal <quimmuntal@gmail.com>
|
|
AppendRune appends the UTF-16 encoding of a rune to a []uint16.
BenchmarkEncodeValidASCII-12 24.61ns 16B 1allocs
BenchmarkEncodeValidJapaneseChars-12 18.79ns 8B 1allocs
BenchmarkAppendRuneValidASCII-12 6.826ns 0B 0allocs
BenchmarkAppendRuneValidJapaneseChars-12 3.547ns 0B 0allocs
The ASCII case is written to be inlineable.
Fixes #51896
Change-Id: I593b1029f603297ef6e80e036f2fee2a0938d38d
Reviewed-on: https://go-review.googlesource.com/c/go/+/409054
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Joedian Reid <joedian@golang.org>
|
|
Each URL was manually verified to ensure it did not serve up incorrect
content.
Change-Id: I4dc846227af95a73ee9a3074d0c379ff0fa955df
Reviewed-on: https://go-review.googlesource.com/115798
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
|
|
This is a subset of https://golang.org/cl/20022 with only the copyright
header lines, so the next CL will be smaller and more reviewable.
Go policy has been single space after periods in comments for some time.
The copyright header template at:
https://golang.org/doc/contribute.html#copyright
also uses a single space.
Make them all consistent.
Change-Id: Icc26c6b8495c3820da6b171ca96a74701b4a01b0
Reviewed-on: https://go-review.googlesource.com/20111
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
|
|
For #6957
Change-Id: Ic497c12f33efc933e9fe81f6cd1b2a0a01abbabf
Reviewed-on: https://go-review.googlesource.com/19820
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
|
|
Preparation was in CL 134570043.
This CL contains only the effect of 'hg mv src/pkg/* src'.
For more about the move, see golang.org/s/go14nopkg.
|
