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| author | Iskander Sharipov <iskander.sharipov@intel.com> | 2018-06-21 20:43:10 +0300 |
|---|---|---|
| committer | Brad Fitzpatrick <bradfitz@golang.org> | 2018-08-21 03:14:39 +0000 |
| commit | bce1f12225b9a2a3d8e59f3b1f1776e5baec9edf (patch) | |
| tree | a7fb55fbdb8f33684f1e58d018fcbb80f6ee8eec /src/net | |
| parent | fc5107c27011e1c1b70eb35a6fb7b3efd0cf3cea (diff) | |
| download | go-bce1f12225b9a2a3d8e59f3b1f1776e5baec9edf.tar.xz | |
cmd/compile/internal/ssa: use math/bits in countRegs and pickReg
Makes code simpler and faster (at least on x86).
name old time/op new time/op delta
CountRegs-8 7.40ns ± 1% 0.59ns ± 0% -92.02% (p=0.000 n=9+9)
PickReg/(1<<0)-8 2.07ns ± 0% 0.37ns ± 0% -82.13% (p=0.000 n=9+10)
PickReg/(1<<16)-8 11.8ns ± 0% 0.4ns ± 0% -96.86% (p=0.002 n=8+10)
Change-Id: Ic780b615b75c25b6e7632a0de93b16a8e9ed0f8f
Reviewed-on: https://go-review.googlesource.com/120318
Run-TryBot: Iskander Sharipov <iskander.sharipov@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Diffstat (limited to 'src/net')
0 files changed, 0 insertions, 0 deletions