8589049d5c
CVTSL2SS, CVTSQ2SS, CVTSL2SD, CVTSQ2SD preserve upper part of xmm register, introducing false dependency on a previous value. Break it by xoring destination with itself. Increases size of go executable by 320 bytes, but shows nice improvement on go1. Also fixes performance degradation introduced by 1.7. name old time/op new time/op delta BinaryTree17-4 2.20s ± 1% 2.19s ± 0% -0.36% (p=0.000 n=18+16) Fannkuch11-4 2.44s ± 1% 2.45s ± 2% +0.47% (p=0.030 n=20+20) FmtFprintfEmpty-4 40.9ns ± 7% 40.5ns ± 1% ~ (p=0.531 n=20+16) FmtFprintfString-4 111ns ± 2% 111ns ± 1% ~ (p=0.510 n=18+19) FmtFprintfInt-4 98.3ns ± 3% 99.3ns ± 1% +1.01% (p=0.003 n=20+18) FmtFprintfIntInt-4 148ns ± 3% 147ns ± 1% ~ (p=0.919 n=20+17) FmtFprintfPrefixedInt-4 149ns ± 1% 152ns ± 0% +1.73% (p=0.000 n=19+17) FmtFprintfFloat-4 231ns ± 0% 231ns ± 1% ~ (p=0.678 n=18+19) FmtManyArgs-4 667ns ± 1% 672ns ± 1% +0.73% (p=0.005 n=20+20) GobDecode-4 5.60ms ± 0% 5.61ms ± 0% +0.24% (p=0.000 n=20+20) GobEncode-4 4.74ms ± 0% 4.73ms ± 1% -0.20% (p=0.002 n=20+20) Gzip-4 199ms ± 0% 199ms ± 1% +0.35% (p=0.000 n=19+20) Gunzip-4 31.8ms ± 1% 31.5ms ± 1% -0.89% (p=0.000 n=20+20) HTTPClientServer-4 38.1µs ± 1% 38.0µs ± 1% ~ (p=0.117 n=19+18) JSONEncode-4 14.2ms ± 1% 13.4ms ± 0% -5.73% (p=0.000 n=20+20) JSONDecode-4 42.7ms ± 0% 42.7ms ± 1% +0.18% (p=0.019 n=18+19) Mandelbrot200-4 3.26ms ± 0% 2.99ms ± 0% -8.38% (p=0.000 n=19+19) GoParse-4 2.76ms ± 1% 2.76ms ± 1% ~ (p=0.583 n=20+20) RegexpMatchEasy0_32-4 69.5ns ± 0% 69.6ns ± 0% +0.10% (p=0.017 n=16+17) RegexpMatchEasy0_1K-4 703ns ± 0% 708ns ± 3% +0.65% (p=0.000 n=17+18) RegexpMatchEasy1_32-4 68.2ns ± 1% 68.2ns ± 2% ~ (p=0.094 n=18+20) RegexpMatchEasy1_1K-4 288ns ± 1% 288ns ± 0% ~ (p=0.403 n=17+18) RegexpMatchMedium_32-4 104ns ± 2% 103ns ± 1% ~ (p=0.110 n=20+16) RegexpMatchMedium_1K-4 31.7µs ± 3% 31.7µs ± 3% ~ (p=0.091 n=19+20) RegexpMatchHard_32-4 1.59µs ± 2% 1.58µs ± 2% ~ (p=0.083 n=20+20) RegexpMatchHard_1K-4 48.1µs ± 3% 47.9µs ± 2% ~ (p=0.461 n=20+19) Revcomp-4 344ms ± 0% 345ms ± 0% +0.08% (p=0.009 n=18+17) Template-4 44.8ms ± 1% 44.7ms ± 1% ~ (p=0.277 n=20+20) TimeParse-4 258ns ± 0% 258ns ± 0% ~ (all samples are equal) TimeFormat-4 275ns ± 0% 273ns ± 0% -0.64% (p=0.000 n=20+18) name old speed new speed delta GobDecode-4 137MB/s ± 0% 137MB/s ± 0% -0.24% (p=0.000 n=20+20) GobEncode-4 162MB/s ± 0% 162MB/s ± 0% +0.20% (p=0.002 n=20+20) Gzip-4 97.6MB/s ± 0% 97.3MB/s ± 1% -0.35% (p=0.000 n=19+20) Gunzip-4 610MB/s ± 1% 615MB/s ± 1% +0.89% (p=0.000 n=20+20) JSONEncode-4 136MB/s ± 1% 145MB/s ± 0% +6.08% (p=0.000 n=20+20) JSONDecode-4 45.5MB/s ± 0% 45.4MB/s ± 1% -0.17% (p=0.017 n=18+19) GoParse-4 21.0MB/s ± 1% 21.0MB/s ± 1% ~ (p=0.578 n=20+20) RegexpMatchEasy0_32-4 460MB/s ± 0% 460MB/s ± 0% -0.09% (p=0.031 n=16+17) RegexpMatchEasy0_1K-4 1.46GB/s ± 0% 1.45GB/s ± 3% -0.64% (p=0.000 n=17+18) RegexpMatchEasy1_32-4 469MB/s ± 0% 469MB/s ± 2% +0.06% (p=0.043 n=18+20) RegexpMatchEasy1_1K-4 3.55GB/s ± 1% 3.55GB/s ± 0% ~ (p=0.057 n=17+18) RegexpMatchMedium_32-4 9.61MB/s ± 2% 9.64MB/s ± 2% ~ (p=0.856 n=20+20) RegexpMatchMedium_1K-4 32.3MB/s ± 3% 32.3MB/s ± 3% ~ (p=0.085 n=19+20) RegexpMatchHard_32-4 20.1MB/s ± 2% 20.2MB/s ± 2% ~ (p=0.086 n=20+20) RegexpMatchHard_1K-4 21.3MB/s ± 3% 21.4MB/s ± 2% ~ (p=0.578 n=20+20) Revcomp-4 738MB/s ± 0% 737MB/s ± 0% -0.08% (p=0.009 n=18+17) Template-4 43.3MB/s ± 1% 43.4MB/s ± 1% ~ (p=0.274 n=20+20) Fixes #16982 Change-Id: If574d66f39f4183a9b1d5ffff0339909cc73f59d Reviewed-on: https://go-review.googlesource.com/31490 Run-TryBot: Ilya Tocar <ilya.tocar@intel.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org> |
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robots.txt |
The Go Programming Language
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Binary Distribution Notes
If you have just untarred a binary Go distribution, you need to set the environment variable $GOROOT to the full path of the go directory (the one containing this file). You can omit the variable if you unpack it into /usr/local/go, or if you rebuild from sources by running all.bash (see doc/install-source.html). You should also add the Go binary directory $GOROOT/bin to your shell's path.
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