• Keith Randall's avatar
    runtime: use duff zero and copy to initialize memory · 51b72d94
    Keith Randall authored
    benchmark                 old ns/op     new ns/op     delta
    BenchmarkCopyFat512       1307          329           -74.83%
    BenchmarkCopyFat256       666           169           -74.62%
    BenchmarkCopyFat1024      2617          671           -74.36%
    BenchmarkCopyFat128       343           89.0          -74.05%
    BenchmarkCopyFat64        182           48.9          -73.13%
    BenchmarkCopyFat32        103           28.8          -72.04%
    BenchmarkClearFat128      102           46.6          -54.31%
    BenchmarkClearFat512      344           167           -51.45%
    BenchmarkClearFat64       50.5          26.5          -47.52%
    BenchmarkClearFat256      147           87.2          -40.68%
    BenchmarkClearFat32       22.7          16.4          -27.75%
    BenchmarkClearFat1024     511           662           +29.55%
    
    Fixes #7624
    
    LGTM=rsc
    R=golang-codereviews, khr, bradfitz, josharian, dave, rsc
    CC=golang-codereviews
    https://golang.org/cl/92760044
    51b72d94
obj5.c 21.9 KB