[Webkit-unassigned] [Bug 42264] Prepare YARR JIT for matching regexps with iterative parentheses

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=42264





--- Comment #4 from Peter Varga <pvarga at inf.u-szeged.hu>  2010-07-15 09:06:57 PST ---
(In reply to comment #2)

Hi Gavin, thank you very much for your thorough feedback.

I'm trying to answer according your points.

(1) I was planning to introduce stack guards after finishing the remaining features.
A custom allocator for YARR sounds good, but I'm not so experienced in the topic of allocators 
therefore I need some time to investigate the possibilities.

(2) On which platform did you measure this performance result? I did a measurement too on v8-regex 
and didn't get such a big performance regression on Linux with the old patch:

                   reference        modified
regexp:       *1.081x as slow*   418.7ms +/- 1.4%    452.7ms +/- 1.3%

Despite that I fixed the issue. You can also check the new combined performance results at the master bug.

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