| commit | a0fad982b17b8c49c8567867160dee9f021cf1ba | [log] [tgz] |
|---|---|---|
| author | Lynn Boger <laboger@linux.vnet.ibm.com> | Mon Aug 27 16:34:53 2018 -0400 |
| committer | Lynn Boger <laboger@linux.vnet.ibm.com> | Wed Sep 12 15:47:43 2018 +0000 |
| tree | 31655569c5420d062e177e94c9929aec04949cf2 | |
| parent | e7f5f3eca42a98340e4eb4fc5d490a9aa4bd5054 [diff] |
internal/bytealg: implement bytes.Count in asm for ppc64x This adds an asm implementation for the Count function in ppc64x. The Go code that manipulates a byte at a time is especially inefficient on ppc64x, so an asm implementation is a significant improvement. bytes: name old time/op new time/op delta CountSingle/10-8 23.1ns ± 0% 18.6ns ± 0% -19.48% (p=1.000 n=1+1) CountSingle/32-8 60.4ns ± 0% 19.0ns ± 0% -68.54% (p=1.000 n=1+1) CountSingle/4K-8 7.29µs ± 0% 0.45µs ± 0% -93.80% (p=1.000 n=1+1) CountSingle/4M-8 7.49ms ± 0% 0.45ms ± 0% -93.97% (p=1.000 n=1+1) CountSingle/64M-8 127ms ± 0% 9ms ± 0% -92.53% (p=1.000 n=1+1) html: name old time/op new time/op delta Escape-8 57.5µs ± 0% 36.1µs ± 0% -37.13% (p=1.000 n=1+1) EscapeNone-8 20.0µs ± 0% 2.0µs ± 0% -90.14% (p=1.000 n=1+1) Change-Id: Iadbf422c0e9a37b47d2d95fb8c778420f3aabb58 Reviewed-on: https://go-review.googlesource.com/131695 Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Michael Munday <mike.munday@ibm.com>
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