[Webkit-unassigned] [Bug 65377] Hidden text nodes slow down position traversing

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=65377





--- Comment #7 from Yong Li <yong.li.webkit at gmail.com>  2011-07-29 10:37:12 PST ---
(In reply to comment #0)
> Created an attachment (id=102361)
 --> (https://bugs.webkit.org/attachment.cgi?id=102361&action=review) [details]
> the test case
> 
> When WebKit traverses positions, it wastes CPU time on hidden text nodes.
> 
> Open the test case in a WebKit browser, click the blank area on the left of the visible text, you will see the page doesn't respond for text selection any more. This is because WebKit is busy in traversing hidden text nodes.
> 
> The test case doesn't exist in real world. However pages with hidden text do exist in real world, and if we fix this, we could probably boost selection performance in some cases.

Correction: "click the blank area on the left of..." shouldbe "on the right of"

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