[Webkit-unassigned] [Bug 36303] Inserting CSS rules one at a time via js causes slow synchronous style recalculation

Fri Mar 19 15:13:04 PDT 2010

https://bugs.webkit.org/show_bug.cgi?id=36303

--- Comment #5 from James Robinson <jamesr at chromium.org>  2010-03-19 15:13:04 PST ---
Or to put it another way, why not always force the Node::lazyAttach() case. 
I'm experimenting with this locally and it seems to not be too bad.  The tricky
cases are plugins and shadow DOM trees.  Plugins are tricky because they are
instantiated through a RenderWidget and need to start up synchronously, but it
should be pretty simple to force a layout pass after adding them to the DOM. 
Shadow DOM trees can be lazily created, there's no reason for them to even
exist until layout will occur.  There are a few more corner cases but they
don't seem too tricky.

Is there any reason why this can't work?

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