• Joel Sing's avatar
    crypto/sha1, crypto/sha256, crypto/sha512: use copy for partial block · 29fe067b
    Joel Sing authored
    Use copy rather than a hand rolled loop when moving a partial input
    block to the scratch area. This results in a reasonable performance
    gain when partial blocks are written.
    
    Benchmarks on Intel(R) Xeon(R) CPU X5650  @ 2.67GHz with Go amd64:
    
           benchmark               old MB/s     new MB/s  speedup
    SHA1   BenchmarkHash8Bytes        18.37        22.80    1.24x
    SHA256 BenchmarkHash8Bytes        11.86        13.78    1.16x
    SHA512 BenchmarkHash8Bytes         4.51         5.24    1.16x
    
           benchmark              old ns/op    new ns/op    delta
    SHA1   BenchmarkHash8Bytes          435          350  -19.54%
    SHA256 BenchmarkHash8Bytes          674          580  -13.95%
    SHA512 BenchmarkHash8Bytes         1772         1526  -13.88%
    
    R=agl, dave, bradfitz
    CC=golang-codereviews
    https://golang.org/cl/35840044
    29fe067b
sha512.go 3.79 KB