RESOLVED WORKSFORME Bug 12637
Long-running regular expressions should be interruptible 
https://bugs.webkit.org/show_bug.cgi?id=12637
Summary Long-running regular expressions should be interruptible
David Smith
Reported 2007-02-06 13:03:24 PST
Regular expressions can take arbitrarily long to match, but cannot currently be interrupted. This can lead to hangs of arbitrary length, which is probably a bad thing. The test URL will cause a fairly long pause (in the Feb. 5th nightly build), but it will eventually recover.
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David Smith
Comment 1 2007-02-28 22:29:51 PST
This is no longer nearly as serious after some regex speedups shortly after the nightly I tested with. It still causes very high cpu usage and pauses, but it doesn't freeze the browser for more than a second or so on my Core 2 Duo 2GHz machine, and the freeze time is bounded (i.e. increasing the regex size beyond a certain point doesn't increase the time).
Gavin Barraclough
Comment 2 2012-09-23 15:32:29 PDT
The old timeout mechanism has now been deprecated, and this is handled by webkit2 - if a script runs for too long, the browser can just shoot down the webprocess.
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