[Webkit-unassigned] [Bug 199650] Keyword lookup can use memcmp to get around unaligned load undefined behavior

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Thu Sep 5 13:35:56 PDT 2019


https://bugs.webkit.org/show_bug.cgi?id=199650

--- Comment #15 from Filip Pizlo <fpizlo at apple.com> ---
(In reply to Yusuke Suzuki from comment #14)
> Our performance bots is saying that this causes 5% regression in
> JetStream2/multi-inspector-code-load, and 2.5% regression in
> JetStream2/first-inspector-code-load. Until we can fix this regression, I'll
> roll-out this patch for now.

Yeah let’s roll out. 

We should avoid these changes like the plague.

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