[Webkit-unassigned] [Bug 86813] WebKit spends ~20% of time in HTMLTextAreaElement::defaultValue() when opening a review page

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=86813





--- Comment #12 from Ryosuke Niwa <rniwa at webkit.org>  2012-05-21 11:26:37 PST ---
It appears that just using StringBuilder instead of operator+= will fix this perf. hit. Now we're spending roughly 8% of time in treeScope() :( Someone needs to make treeScope O(1). It's showing up every time I profile some DOM operation.

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