Brian Kessler 1ccb66d1ef hash/fnv: use bits.Mul64 for 128-bit hash ... Replace the 128-bit multiplication in 4 parts with bits.Mul64 and two single-width multiplications. This simplifies the code and increases throughput by ~50% on amd64. name old time/op new time/op delta Fnv128KB-4 9.64µs ± 0% 6.09µs ± 0% -36.89% (p=0.016 n=4+5) Fnv128aKB-4 9.11µs ± 0% 6.17µs ± 5% -32.32% (p=0.008 n=5+5) name old speed new speed delta Fnv128KB-4 106MB/s ± 0% 168MB/s ± 0% +58.44% (p=0.016 n=4+5) Fnv128aKB-4 112MB/s ± 0% 166MB/s ± 5% +47.85% (p=0.008 n=5+5) Change-Id: Id752f2a20ea3de23a41e08db89eecf2bb60b7e6d Reviewed-on: https://go-review.googlesource.com/c/133936 Run-TryBot: Matt Layher <mdlayher@gmail.com> Run-TryBot: Robert Griesemer <gri@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Matt Layher <mdlayher@gmail.com> Reviewed-by: Robert Griesemer <gri@golang.org>		2018-12-10 22:50:48 +00:00
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