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Dave Cheney authored
Fixes #4963. Sets the append crossover to 0 on intel platforms. Results for linux/amd64 Core i5 SNB benchmark old ns/op new ns/op delta BenchmarkAppend 102 104 +1.96% BenchmarkAppend1Byte 10 11 +0.92% BenchmarkAppend4Bytes 15 11 -28.10% BenchmarkAppend7Bytes 17 12 -32.58% BenchmarkAppend8Bytes 18 12 -36.17% BenchmarkAppend15Bytes 24 11 -55.02% BenchmarkAppend16Bytes 25 11 -56.03% BenchmarkAppend32Bytes 11 12 +4.31% BenchmarkAppendStr1Byte 8 9 +13.99% BenchmarkAppendStr4Bytes 11 9 -17.52% BenchmarkAppendStr8Bytes 14 9 -35.70% BenchmarkAppendStr16Bytes 21 9 -55.19% BenchmarkAppendStr32Bytes 10 10 -5.66% BenchmarkAppendSpecialCase 49 52 +7.96% Results for linux/386 Atom(TM) CPU 330 @ 1.60GHz benchmark old ns/op new ns/op delta BenchmarkAppend 219 218 -0.46% BenchmarkAppend1Byte 75 72 -3.44% BenchmarkAppend4Bytes 92 73 -19.87% BenchmarkAppend7Bytes 108 74 -31.20% BenchmarkAppend8Bytes 116 74 -35.95% BenchmarkAppend15Bytes 162 77 -52.22% BenchmarkAppend16Bytes 169 77 -54.20% BenchmarkAppend32Bytes 88 86 -2.38% BenchmarkAppendStr1Byte 57 59 +3.32% BenchmarkAppendStr4Bytes 72 59 -17.40% BenchmarkAppendStr8Bytes 92 60 -34.70% BenchmarkAppendStr16Bytes 141 63 -54.89% BenchmarkAppendStr32Bytes 75 73 -2.64% BenchmarkAppendSpecialCase 270 270 +0.00% R=golang-dev, r CC=golang-dev https://golang.org/cl/12440044
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