[Webkit-unassigned] [Bug 30055] Bad DOM performance in large SVG files

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=30055





--- Comment #21 from Oliver Hunt <oliver at apple.com>  2009-12-10 10:22:12 PST ---
(In reply to comment #19)
> (In reply to comment #17)
> > The problem is that if the underlying graphics library is already doing the
> > tests it may have a more efficient way of doing so, add to that the fact that
> > the underlying graphics libraries that do perform sensible clipping
> > optimisations will still be doing their own clip tests this seems like a patch
> > that has bad perf impact on good libraries to deal with poor performance in
> > others.
> So this patch has to move to a higher level where "more intelligent" test can
> be done and the clipping should be fixed in GraphicsContextQt directly.
> 
> However the following test is much slower(!) in Safari/Chrome than in FF:
> Click on "Set first lime/red" at http://paroga.com/webkit/rect.php?c=80000&s=2
> On my machine: FF ~150ms, Opera ~300ms, Chrome ~2s, Safari ~10s
> 
> How to get the same performance of FF/Opera in WebCore? Any suggestions?

I don't see this 10s delay you're referring to what platform are you testing
on?

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