[Webkit-unassigned] [Bug 90003] [chromium] fast/js/repeat-cached-vm-reentry.html is timing out on Mac (dbg) and Win (dbg)

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Tue Jul 3 06:19:48 PDT 2012


jkummerow at chromium.org changed:

           What    |Removed                     |Added
                 CC|                            |jkummerow at chromium.org

--- Comment #7 from jkummerow at chromium.org  2012-07-03 06:19:48 PST ---
Thanks for the detailed analysis of affected revisions ranges. This is indeed a V8 problem.

It turned out to be relatively benign: in debug mode, there's a checking routine that is quadratic in the number of optimized closures, and this particular test happens to create a huge number of closures that due to recent improvements in V8 now share their optimized code. Release mode is not affected.

I have landed a workaround in V8's bleeding_edge branch, which will probably roll into Chromium tomorrow or so (look for V8 version 3.12.8).

As a side note, this test is pretty braindead and essentially tests undefined behavior (namely, sorting an array with a comparator function that always returns 1). We are lucky that it passes at all :-)

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