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Russ Cox authored
Rewrite MOVB with less expensive instruction when possible. Suggested by atomic symbol. benchmark old ns/op new ns/op delta crc32.BenchmarkCrc32KB 13066 3942 -69.83% crc64.BenchmarkCrc64KB 8780 5949 -32.24% lzw.BenchmarkDecoder1e4 771224 636538 -17.46% lzw.BenchmarkDecoder1e5 7101218 6096634 -14.15% lzw.BenchmarkDecoder1e6 69762020 60789400 -12.86% lzw.BenchmarkEncoder1e4 707968 638812 -9.77% lzw.BenchmarkEncoder1e5 6567122 5965552 -9.16% lzw.BenchmarkEncoder1e6 65006000 58911680 -9.38% utf8_test.BenchmarkRuneCountTenASCIIChars 166 165 -0.60% utf8_test.BenchmarkRuneCountTenJapaneseChars 246 258 +4.88% utf8_test.BenchmarkEncodeASCIIRune 13 10 -23.08% utf8_test.BenchmarkEncodeJapaneseRune 37 16 -56.76% utf8_test.BenchmarkDecodeASCIIRune 23 21 -8.70% utf8_test.BenchmarkDecodeJapaneseRune 58 32 -44.83% R=ken2 CC=golang-dev https://golang.org/cl/4381045
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