[Webkit-unassigned] [Bug 52561] Changing innerHTML gets progressively slower, spinning in updateStyleSelector()

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=52561


Alexey Proskuryakov <ap at webkit.org> changed:

           What    |Removed                     |Added
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           Keywords|                            |NeedsReduction




--- Comment #9 from Alexey Proskuryakov <ap at webkit.org>  2011-01-24 23:01:28 PST ---
The main cause of bad performance is that the script leaks <link> elements. If you open the test page and enter the following in address bar, you can see that the number of stylesheets grows, quickly reaching hundreds:

javascript:alert(document.getElementsByTagName("link").length)

And with this, you can see the current DOM:

javascript:alert((new XMLSerializer).serializeToString(document.documentElement))

It would be good to create a small test case to see what exactly is slow in WebKit - Firefox also shows the growth, but it doesn't get so slow. I suspect that it's an edge case though, and unfortunately I don't have more time to work on this now.

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