[Webkit-unassigned] [Bug 61239] Unbearably slow performance on MinGW-w64

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=61239





--- Comment #2 from Jonathan Liu <net147 at gmail.com>  2011-05-23 03:44:12 PST ---
To check whether this occurs in Qt, specify / as a command line argument to one of the examples (e.g. browser.exe / or fancybrowser.exe /). Then you can navigate to http://acid3.acidtests.org/ or http://jquery.malsup.com/cycle/ to check performance and try auto-scroll with middle-click. The / argument is to avoid the example programs crashing on startup if JIT is enabled.

The patch from https://bugs.webkit.org/show_bug.cgi?id=61235 to disable JIT can be used to avoid crashing on startup if using QtWebKit 2.2 branch. The performance problem still remains though.

This performance problem seems to occur regardless of whether JIT is enabled or disabled.

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