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Optimize masking with math/bits#171
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Seegolang/go#31586 (comment)Thanks@renthrayskbenchmark old MB/s new MB/s speedupBenchmarkXOR/2/fast-8 470.88 492.61 1.05xBenchmarkXOR/3/fast-8 602.24 719.25 1.19xBenchmarkXOR/4/fast-8 718.82 1186.64 1.65xBenchmarkXOR/8/fast-8 1027.60 1718.71 1.67xBenchmarkXOR/16/fast-8 1413.31 3430.46 2.43xBenchmarkXOR/32/fast-8 2701.81 5585.42 2.07xBenchmarkXOR/128/fast-8 7757.97 13432.37 1.73xBenchmarkXOR/512/fast-8 15155.03 18797.79 1.24xBenchmarkXOR/4096/fast-8 20689.95 20334.61 0.98xBenchmarkXOR/16384/fast-8 21687.87 21613.94 1.00xNow its faster than basic XOR at every byte size greater than 2 onlittle endian amd64 machines.
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nhooyr commentedNov 7, 2019 • edited
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More optimization is possible, seegolang/go#31586 (comment) |
Thanks again to@renthrayskThis provides another significant speedup.benchmark old MB/s new MB/s speedupBenchmark_mask/2/fast-8 405.48 513.25 1.27xBenchmark_mask/3/fast-8 518.93 661.92 1.28xBenchmark_mask/4/fast-8 1207.10 1252.39 1.04xBenchmark_mask/8/fast-8 1708.82 1655.63 0.97xBenchmark_mask/16/fast-8 3418.58 3051.25 0.89xBenchmark_mask/32/fast-8 5789.43 5813.31 1.00xBenchmark_mask/128/fast-8 12819.53 14804.50 1.15xBenchmark_mask/512/fast-8 18247.06 21659.50 1.19xBenchmark_mask/4096/fast-8 19802.31 23885.68 1.21xBenchmark_mask/16384/fast-8 20896.97 25081.11 1.20x
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Seegolang/go#31586 (comment)
Thanks@renthraysk
Now its faster than basic XOR at every byte size greater than 2 on little
endian amd64 machines.
And faster at every level than gobwas/ws and gorilla/websocket.