B3::fixSSA() has problems in Octane/regexp 
https://bugs.webkit.org/show_bug.cgi?id=154828
Summary B3::fixSSA() has problems in Octane/regexp
Filip Pizlo
Reported 2016-02-29 11:41:50 PST
Usually you know that everything is OK when the compiler spends 95% of its time in IRC. But in Octane/regexp, this is not the case! We spent lots of time in fixSSA() instead. That usually means a scalability problem in that phase. I've known for a while now that our SSA conversion has scalability problems, and it looks like we're now seeing this. Note: I don't think that this is actually bottlenecking Octane/regexp performance. So it's not a high priority right now.
Attachments
fixSSA going nuts according to Instruments (493.21 KB, image/png)
2016-02-29 11:46 PST, Filip Pizlo 		no flags
Details
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Filip Pizlo
Comment 1 2016-02-29 11:46:23 PST
Created attachment 272507 [details] fixSSA going nuts according to Instruments
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