12acf9b0f0
Optimize memclr by removing simple case loop along with the runtime check since AVX2 is guaranteed to be available when compiling with GOAMD64 >= 3 name old speed new speed delta Memclr/5-12 2.70GB/s ± 1% 2.73GB/s ± 1% ~ (p=0.056 n=5+5) Memclr/16-12 7.00GB/s ± 2% 7.03GB/s ± 1% ~ (p=1.000 n=5+5) Memclr/64-12 25.5GB/s ± 1% 25.5GB/s ± 1% ~ (p=0.548 n=5+5) Memclr/256-12 53.4GB/s ± 1% 52.7GB/s ± 2% ~ (p=0.222 n=5+5) Memclr/4096-12 109GB/s ± 1% 129GB/s ± 0% +18.57% (p=0.008 n=5+5) Memclr/65536-12 75.2GB/s ± 2% 78.3GB/s ± 3% +4.14% (p=0.008 n=5+5) Memclr/1M-12 53.5GB/s ± 2% 54.1GB/s ± 2% ~ (p=0.310 n=5+5) Memclr/4M-12 53.1GB/s ± 3% 52.9GB/s ± 2% ~ (p=1.000 n=5+5) Memclr/8M-12 44.6GB/s ± 3% 45.1GB/s ± 3% ~ (p=0.310 n=5+5) Memclr/16M-12 24.8GB/s ± 2% 24.2GB/s ± 2% ~ (p=0.056 n=5+5) Memclr/64M-12 38.3GB/s ± 1% 37.8GB/s ± 1% ~ (p=0.056 n=5+5) [Geo mean] 31.0GB/s 31.5GB/s +1.78% Change-Id: I6f3014f6338cb3b5a1b94503faa205f043fe2de8 Reviewed-on: https://go-review.googlesource.com/c/go/+/367494 Trust: Cherry Mui <cherryyz@google.com> Trust: Daniel Martí <mvdan@mvdan.cc> Run-TryBot: Daniel Martí <mvdan@mvdan.cc> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org> |
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