16186 2007-11-29 04:12:23 -0800 Reduce number of c-stack-based MatchFrames 2011-09-06 22:31:16 -0700 1 1 1 Unclassified WebKit JavaScriptCore 523.x (Safari 3) Mac OS X 10.4 RESOLVED INVALID P2 Normal --- 16185 16187 1 eric webkit-unassigned barraclough darin ggaren mjs oldest_to_newest 62681 0 eric 2007-11-29 04:12:23 -0800 Reduce number of c-stack-based MatchFrames I believe the credit for this idea goes to Darin, I heard about it through Maciej. Currently we allocate space for 16 match frames every time we call into match(). That's excessive, since very very very few regexps ever go beyond a few frames. Supposedly darin tried this and found that reducing to 4 frames was a big speedup. I expect we could probably reduce to 8 frames w/o worrying too much about affecting real-world performance. Until bug 16185 is fixed, we always use 2 frames for every regexp. :( 62685 1 eric 2007-11-29 05:06:11 -0800 I just tested reducing FRAMES_ON_STACK to 8 and 4, and saw no change in SunSpider. Unless I missed something, we might just want to close this bug. 463155 2 barraclough 2011-09-06 22:31:16 -0700 This is a proposed optimization for PCRE; we no longer use PCRE.