commit | a0771caebe87477558454cc6d793562e3afe74ac | [log] [tgz] |
---|---|---|
author | Adenilson Cavalcanti <cavalcantii@chromium.org> | Sun May 22 00:35:52 2022 |
committer | Chromium LUCI CQ <chromium-scoped@luci-project-accounts.iam.gserviceaccount.com> | Sun May 22 00:35:52 2022 |
tree | 6a429ff7539ebb18cd4000875fa82c476944a4ac | |
parent | 31213dddfe9b774bc15fdf7d570058899182d1ee [diff] |
[zlib] Adding PMULL based CRC-32 for aarch64 Using the polynomial multiplication instruction allows to improve a bit more the decompression speed of gzipped content in zlib. The average gains are not massive though (around +4.9%), but is more expressive for some relevant content (e.g. +10% for HTMLx4 & JPEG, +6% for JS) in more recent chip designs. Since Chrome is distributed as a 64bit binary (i.e. aarch64) only for higher end devices, it should be safe from a performance perspective. For lower spec devices, the same serial crc32 code using the crypto extensions is used, therefore no change on behavior for 32bit. Bug: 873725 Change-Id: I33b9b345b82b5256ec922324984f9a371949bbe6 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2422723 Reviewed-by: Chris Blume <cblume@chromium.org> Commit-Queue: Adenilson Cavalcanti <cavalcantii@chromium.org> Cr-Commit-Position: refs/heads/main@{#1006184}
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