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| author | Josh Bleecher Snyder <josharian@gmail.com> | 2020-12-16 20:28:43 -0800 |
|---|---|---|
| committer | Josh Bleecher Snyder <josharian@gmail.com> | 2021-03-11 19:04:42 +0000 |
| commit | b0733ba12d1190859a95ee93edac940de8052fed (patch) | |
| tree | d891cb282363ae35a25a4fbd521fabd157c0be0f /src/hash | |
| parent | 64d323f45a5d6a36cdcb190bed56424a633af3ad (diff) | |
| download | go-b0733ba12d1190859a95ee93edac940de8052fed.tar.gz go-b0733ba12d1190859a95ee93edac940de8052fed.zip | |
hash/maphash: increase the buffer size
This helps a lot for larger writes.
name old time/op new time/op delta
Hash8Bytes-8 16.5ns ± 4% 16.8ns ± 2% +1.76% (p=0.000 n=29+30)
Hash320Bytes-8 55.0ns ± 2% 41.4ns ± 2% -24.64% (p=0.000 n=28+28)
Hash1K-8 190ns ± 2% 130ns ± 3% -31.65% (p=0.000 n=30+30)
Hash8K-8 1.57µs ± 2% 1.05µs ± 3% -33.01% (p=0.000 n=30+29)
name old speed new speed delta
Hash8Bytes-8 485MB/s ± 4% 476MB/s ± 2% -1.73% (p=0.000 n=29+30)
Hash320Bytes-8 5.82GB/s ± 2% 7.72GB/s ± 3% +32.55% (p=0.000 n=28+29)
Hash1K-8 5.39GB/s ± 2% 7.88GB/s ± 3% +46.32% (p=0.000 n=30+30)
Hash8K-8 5.21GB/s ± 2% 7.77GB/s ± 3% +49.28% (p=0.000 n=30+29)
Updates #42710
Change-Id: Idaf4b2a8a41fc62fc16b54c9358cf2cc7009cf29
Reviewed-on: https://go-review.googlesource.com/c/go/+/278760
Trust: Josh Bleecher Snyder <josharian@gmail.com>
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Diffstat (limited to 'src/hash')
| -rw-r--r-- | src/hash/maphash/maphash.go | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/hash/maphash/maphash.go b/src/hash/maphash/maphash.go index 5cc0c581c7..d022d746a7 100644 --- a/src/hash/maphash/maphash.go +++ b/src/hash/maphash/maphash.go @@ -68,7 +68,7 @@ type Hash struct { // The buffer ensures that writes depend only on the sequence of bytes, // not the sequence of WriteByte/Write/WriteString calls, // by always calling rthash with a full buffer (except for the tail). -const bufSize = 64 +const bufSize = 128 // initSeed seeds the hash if necessary. // initSeed is called lazily before any operation that actually uses h.seed/h.state. |