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| author | Lynn Boger <laboger@linux.vnet.ibm.com> | 2022-04-08 13:50:00 -0500 |
|---|---|---|
| committer | Lynn Boger <laboger@linux.vnet.ibm.com> | 2022-04-12 13:54:06 +0000 |
| commit | 9ccf5b8e86ce98494a2127196fbc47d72b0a71a5 (patch) | |
| tree | daf3fee03b35231a1902eace1b9a0537639903eb /src/encoding | |
| parent | d6320f1a58f1f7820daee06a086c83a0274a777f (diff) | |
| download | go-9ccf5b8e86ce98494a2127196fbc47d72b0a71a5.tar.xz | |
runtime: improve memmove for ppc64x
This improves performance of memmove for larger moves by
unrolling the main loop from 32 byte to 64 byte moves.
The improvement of the relevant sizes on a power9:
Memmove/64 5.11ns ± 0% 5.00ns ± 0% -2.21%
Memmove/128 8.26ns ± 0% 5.88ns ± 0% -28.83%
Memmove/256 12.7ns ± 0% 8.6ns ± 0% -31.94%
Memmove/512 17.9ns ± 0% 14.3ns ± 0% -19.87%
Memmove/1024 33.3ns ± 0% 27.0ns ± 0% -18.92%
Memmove/2048 72.1ns ± 0% 51.8ns ± 0% -28.25%
Memmove/4096 126ns ± 0% 110ns ± 0% -12.63%
Change-Id: I74162a9f152d7752a8281da1b89a66da99a3fdc9
Reviewed-on: https://go-review.googlesource.com/c/go/+/399499
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Diffstat (limited to 'src/encoding')
0 files changed, 0 insertions, 0 deletions