[Webkit-unassigned] [Bug 98982] Setting className attribute causes slow performance

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=98982





--- Comment #7 from Erik Arvidsson <arv at chromium.org>  2013-04-05 07:20:55 PST ---
(In reply to comment #5)
> Yes, this is extremely useful. A lot of Javascript libraries implement a naive addClass() function like:
> function addClass(newClass){
>      element.className = element.className + ' ' + newClass;
> }

This case will always be slow since it is always changing the attribute and the list.

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