Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 4300c2ca618ec7fd758457844534313154356d91
https://github.com/WebKit/WebKit/commit/4300c2ca618ec7fd758457844534313154356d91
Author: Daniel Liu <[email protected]>
Date: 2025-04-01 (Tue, 01 Apr 2025)
Changed paths:
A JSTests/stress/regexp-dont-merge-far-apart-characters.js
M Source/JavaScriptCore/yarr/YarrJIT.cpp
Log Message:
-----------
Yarr generatePatternCharacterOnce should limit how far away it coalesces
characters
https://bugs.webkit.org/show_bug.cgi?id=290789
rdar://148244655
Reviewed by Yusuke Suzuki.
Currently, our optimization is able to read pattern characters any number of
characters
away, as long as everything in between is empty. This could lead to unnecessary
loading
of those intermediate characters. We constrain the JIT to search up to 16
characters in
each direction (two 8B loads), allowing us to group close pattern characters,
while not
getting too aggressive with this optimization.
* Source/JavaScriptCore/yarr/YarrJIT.cpp:
* JSTests/stress/regexp-dont-merge-far-apart-characters.js:
Canonical link: https://commits.webkit.org/293011@main
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