| commit | 78fb1d03d39e8357e4790a9f0788ef0a8e7d8ae1 | [log] [tgz] |
|---|---|---|
| author | Archana R <aravind5@in.ibm.com> | Wed Nov 10 01:18:42 2021 -0600 |
| committer | Lynn Boger <laboger@linux.vnet.ibm.com> | Fri Apr 22 12:12:38 2022 +0000 |
| tree | 8402d3170fe39d5e0b0a2ae0e62c30eb58981739 | |
| parent | 1e5987635cc8bf99e8a20d240da80bd6f0f793f7 [diff] |
internal/bytealg: optimize cmpbody for ppc64le/ppc64 Vectorize the cmpbody loop for bytes of size greater than or equal to 32 on both POWER8(LE and BE) and POWER9(LE and BE) and improve performance of smaller size compares Performance improves for most sizes with this change on POWER8, 9 and POWER10. For the very small sizes (upto 8) the overhead of calling function starts to impact performance. POWER9: name old time/op new time/op delta BytesCompare/1 4.60ns ± 0% 5.49ns ± 0% +19.27% BytesCompare/2 4.68ns ± 0% 5.46ns ± 0% +16.71% BytesCompare/4 6.58ns ± 0% 5.49ns ± 0% -16.58% BytesCompare/8 4.89ns ± 0% 5.46ns ± 0% +11.64% BytesCompare/16 5.21ns ± 0% 4.96ns ± 0% -4.70% BytesCompare/32 5.09ns ± 0% 4.98ns ± 0% -2.14% BytesCompare/64 6.40ns ± 0% 5.96ns ± 0% -6.84% BytesCompare/128 11.3ns ± 0% 8.1ns ± 0% -28.09% BytesCompare/256 15.1ns ± 0% 12.8ns ± 0% -15.16% BytesCompare/512 26.5ns ± 0% 23.3ns ± 5% -12.03% BytesCompare/1024 50.2ns ± 0% 41.6ns ± 2% -17.01% BytesCompare/2048 99.3ns ± 0% 86.5ns ± 0% -12.88% Change-Id: I24f93b2910591e6829ddd8509aa6eeaa6355c609 Reviewed-on: https://go-review.googlesource.com/c/go/+/362797 Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com> Run-TryBot: Archana Ravindar <aravind5@in.ibm.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com> Reviewed-by: Than McIntosh <thanm@google.com>
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