4350e4961a
This is mostly cleanup and simplification. This removes many unneeded register moves, loads, and bit twiddlings which were holdovers from porting this from the amd64 version. The updated code loads each block once per iteration instead of once per round. Similarly, the logical operations now match the original md5 specification. Likewise, add extra sizes to the benchtest to give more data points on how the implementation scales with input size. All in all, this is roughly a 20% improvement on ppc64le code running on POWER9 (POWER8 is similar, but around 16%): name old time/op new time/op delta Hash8Bytes 297ns ± 0% 255ns ± 0% -14.14% Hash64 527ns ± 0% 444ns ± 0% -15.76% Hash128 771ns ± 0% 645ns ± 0% -16.35% Hash256 1.26µs ± 0% 1.05µs ± 0% -16.68% Hash512 2.23µs ± 0% 1.85µs ± 0% -16.82% Hash1K 4.16µs ± 0% 3.46µs ± 0% -16.83% Hash8K 31.2µs ± 0% 26.0µs ± 0% -16.74% Hash1M 3.58ms ± 0% 2.98ms ± 0% -16.74% Hash8M 26.1ms ± 0% 21.7ms ± 0% -16.81% Hash8BytesUnaligned 297ns ± 0% 255ns ± 0% -14.08% Hash1KUnaligned 4.16µs ± 0% 3.46µs ± 0% -16.79% Hash8KUnaligned 31.2µs ± 0% 26.0µs ± 0% -16.78% name old speed new speed delta Hash8Bytes 26.9MB/s ± 0% 31.4MB/s ± 0% +16.45% Hash64 122MB/s ± 0% 144MB/s ± 0% +18.69% Hash128 166MB/s ± 0% 199MB/s ± 0% +19.54% Hash256 203MB/s ± 0% 244MB/s ± 0% +20.01% Hash512 230MB/s ± 0% 276MB/s ± 0% +20.18% Hash1K 246MB/s ± 0% 296MB/s ± 0% +20.26% Hash8K 263MB/s ± 0% 315MB/s ± 0% +20.11% Hash1M 293MB/s ± 0% 352MB/s ± 0% +20.10% Hash8M 321MB/s ± 0% 386MB/s ± 0% +20.21% Hash8BytesUnaligned 26.9MB/s ± 0% 31.4MB/s ± 0% +16.41% Hash1KUnaligned 246MB/s ± 0% 296MB/s ± 0% +20.19% Hash8KUnaligned 263MB/s ± 0% 315MB/s ± 0% +20.15% Change-Id: I269bfa6878966bb4f6a64dc349100f5dc453ab7c Reviewed-on: https://go-review.googlesource.com/c/go/+/300613 Run-TryBot: Paul Murphy <murp@ibm.com> Reviewed-by: Lynn Boger <laboger@linux.vnet.ibm.com> TryBot-Result: Go Bot <gobot@golang.org> Trust: Emmanuel Odeke <emmanuel@orijtech.com> |
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