9ccf5b8e86
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> |
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