Bug 98734

Summary:	enclosingLayer() walks the entire parent chain, making it slow for deep trees
Product:	WebKit	Reporter:	Eric Seidel (no email) <eric>
Component:	Layout and Rendering	Assignee:	Nobody <webkit-unassigned>
Status:	NEW
Severity:	Normal	CC:	jamesr, jchaffraix, simon.fraser, tonikitoo
Priority:	P2
Version:	528+ (Nightly build)
Hardware:	Unspecified
OS:	Unspecified
Bug Depends on:
Bug Blocks:	98798

Eric Seidel (no email)

Reported 2012-10-09 02:31:27 PDT

enclosingLayer() walks the entire parent chain, making it slow for deep trees It makes repaint/layout samples account for about 30% of: http://www.robohornet.org/tests/descendantselector.html (which I'm not suggesting is either a good or bad benchmark, merely one which triggers this condition.)

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Simon Fraser (smfr)

Comment 1 2012-10-09 10:21:57 PDT

I assume you mean "slow for deep, layer-sparse trees"?

Eric Seidel (no email)

Comment 2 2012-10-10 11:03:21 PDT

Yes, deep, layer-sparse. :)

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