lordwelch/goimagehash
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
d41c941ded
goimagehash/AUTHORS.md
Dominik Honnef ad2b6ded3b Use bits.OnesCount64 when available 
Benchmark on i7-2600k, which has the POPCNT instruction:

name                 old time/op  new time/op  delta
DistanceIdentical-8  5.08ns ± 0%  1.01ns ± 1%  -80.07%  (p=0.008 n=5+5)
DistanceDifferent-8  81.5ns ± 2%   1.0ns ± 0%  -98.76%  (p=0.016 n=5+4)

Benchmark on Cavium Octeon, a MIPS64 platform with no dedicated
instruction:

name                 old time/op  new time/op  delta
DistanceIdentical-2   120ns ± 6%   144ns ± 5%  +19.93%  (p=0.008 n=5+5)
DistanceDifferent-2   656ns ± 4%   144ns ± 4%  -78.09%  (p=0.008 n=5+5)
2018-05-02 23:52:38 +09:00

211 B
Raw Blame History

AUTHORS