Bug 130380 - V8 regexp spends most time in operationGetById
Summary: V8 regexp spends most time in operationGetById
Alias: None
Product: WebKit
Classification: Unclassified
Component: JavaScriptCore (show other bugs)
Version: 528+ (Nightly build)
Hardware: All All
: P2 Normal
Assignee: Michael Saboff
Depends on:
Reported: 2014-03-17 18:31 PDT by Michael Saboff
Modified: 2014-03-17 20:46 PDT (History)
0 users

See Also:

Patch (7.61 KB, patch)
2014-03-17 19:04 PDT, Michael Saboff
fpizlo: review+
Details | Formatted Diff | Diff

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Description Michael Saboff 2014-03-17 18:31:21 PDT
Profiling shows that operationGetById is the hottest function when running V8 regexp
Comment 1 Michael Saboff 2014-03-17 19:04:26 PDT
Created attachment 226999 [details]

When V8 regexp is run from the command line, this patch nets a 2% performance improvement.

Using the JS performance test script, this patch didn't noticeably improve performance.  This is likely due to longer running code being optimized by the DFG.
Comment 2 Michael Saboff 2014-03-17 20:46:50 PDT
Committed r165797: <http://trac.webkit.org/changeset/165797>