Fix #10109

name                  old time/op    new time/op    delta
Hash5                   72.3ns ± 0%    51.5ns ± 0%   -28.71%  (p=0.000 n=4+5)
Hash16                  78.8ns ± 0%    48.7ns ± 0%      ~     (p=0.079 n=4+5)
Hash64                   196ns ±25%      73ns ±16%   -62.68%  (p=0.008 n=5+5)
Hash1024                1.57µs ± 0%    0.27µs ± 1%   -82.90%  (p=0.000 n=5+4)
Hash65536               96.5µs ± 0%    14.3µs ± 0%   -85.14%  (p=0.016 n=5+4)
HashStringSpeed          156ns ± 6%     129ns ± 3%   -17.56%  (p=0.008 n=5+5)
HashBytesSpeed           227ns ± 1%     200ns ± 1%   -11.98%  (p=0.008 n=5+5)
HashInt32Speed           116ns ± 2%     102ns ± 0%   -11.92%  (p=0.016 n=5+4)
HashInt64Speed           120ns ± 3%     101ns ± 2%   -15.55%  (p=0.008 n=5+5)
HashStringArraySpeed     342ns ± 0%     306ns ± 2%   -10.58%  (p=0.008 n=5+5)
FastrandHashiter         217ns ± 1%     217ns ± 1%      ~     (p=1.000 n=5+5)

name                  old speed      new speed      delta
Hash5                 69.1MB/s ± 0%  97.0MB/s ± 0%   +40.32%  (p=0.008 n=5+5)
Hash16                 203MB/s ± 0%   329MB/s ± 0%   +61.76%  (p=0.016 n=4+5)
Hash64                 332MB/s ±21%   881MB/s ±14%  +165.66%  (p=0.008 n=5+5)
Hash1024               651MB/s ± 0%  3652MB/s ±17%  +460.73%  (p=0.008 n=5+5)
Hash65536              679MB/s ± 0%  4570MB/s ± 0%  +572.85%  (p=0.016 n=5+4)

Change-Id: I573028979f84cf2e0e087951271d5de8865dbf04
Reviewed-on: https://go-review.googlesource.com/89755
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>