• Nigel Tao's avatar
    cmd/gc: inline convT2E when T is uintptr-shaped. · 8f84328f
    Nigel Tao authored
    GOARCH=amd64 benchmarks
    
    src/pkg/runtime
    benchmark                  old ns/op    new ns/op    delta
    BenchmarkConvT2ESmall             10           10   +1.00%
    BenchmarkConvT2EUintptr            9            0  -92.07%
    BenchmarkConvT2EBig               74           74   -0.27%
    BenchmarkConvT2I                  27           26   -3.62%
    BenchmarkConvI2E                   4            4   -7.05%
    BenchmarkConvI2I                  20           19   -2.99%
    
    test/bench/go1
    benchmark                 old ns/op    new ns/op    delta
    BenchmarkBinaryTree17    5930908000   5937260000   +0.11%
    BenchmarkFannkuch11      3927057000   3933556000   +0.17%
    BenchmarkGobDecode         21998090     21870620   -0.58%
    BenchmarkGobEncode         12725310     12734480   +0.07%
    BenchmarkGzip             567617600    567892800   +0.05%
    BenchmarkGunzip           178284100    178706900   +0.24%
    BenchmarkJSONEncode        87693550     86794300   -1.03%
    BenchmarkJSONDecode       314212600    324115000   +3.15%
    BenchmarkMandelbrot200      7016640      7073766   +0.81%
    BenchmarkParse              7852100      7892085   +0.51%
    BenchmarkRevcomp         1285663000   1286147000   +0.04%
    BenchmarkTemplate         566823800    567606200   +0.14%
    
    I'm not entirely sure why the JSON* numbers have changed, but
    eyeballing the profile suggests that it could be spending less
    and more time in runtime.{new,old}stack, so it could simply be
    stack-split boundary noise.
    
    R=rsc, dave, bsiegert, dsymonds
    CC=golang-dev
    https://golang.org/cl/6280049
    8f84328f
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