Bug 11120

Summary:	RenderSVGContainer should cache absoluteTransform for performance
Product:	WebKit	Reporter:	Eric Seidel (no email) <eric>
Component:	SVG	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED INVALID
Severity:	Normal	CC:	emacemac7, zimmermann
Priority:	P4
Version:	420+
Hardware:	Mac
OS:	OS X 10.4

Description Eric Seidel (no email) 2006-10-02 04:57:05 PDT

RenderSVGContainer should cache absoluteTransform for performance

Looking at a shark sample of a very large (30MB) SVG file, we're spending about 6% of our time in RenderSVGContainer::absoluteTransform().  We should cache the absolute transform on each RenderSVGContainer to get rid of this cost.

I'm not sure what the exact invalidation logic would look like.  Changing the transform might need to cause a layout, I'm not sure.  Your parent changing its transform should not need to cause you to re-layout however.  Only redraw.

Comment 1 Nikolas Zimmermann 2010-02-08 04:47:54 PST

absoluteTransforms are not existant anymore in RenderSVG*Container, closing bug.