Bug 6713 - resizing SVG with blur filter is incredibly slow
Summary: resizing SVG with blur filter is incredibly slow
Alias: None
Product: WebKit
Classification: Unclassified
Component: SVG (show other bugs)
Version: 420+
Hardware: Mac OS X 10.4
: P2 Normal
Assignee: Nobody
URL: http://jan.kollhof.net/projects/svg/e...
Keywords: InRadar, NeedsReduction, SVGHitList
Depends on: 7207
Blocks: 68469 26389
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Reported: 2006-01-22 03:32 PST by Eric Seidel (no email)
Modified: 2014-05-12 05:54 PDT (History)
5 users (show)

See Also:

Slightly reduced testcase (5.11 KB, image/svg+xml)
2006-04-27 02:33 PDT, Alex Taylor
no flags Details

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Description Eric Seidel (no email) 2006-01-22 03:32:30 PST
Resizing Safari window sends CoreImage off the deep end


We need to reduce this to the minimal crashing SVG.  At which point we can either fix it in WebKit, or I can take that knowledge to the CoreImage team.
Comment 1 Eric Seidel (no email) 2006-01-26 16:20:17 PST
This is a reproducible crasher for SVG.  Adding to the SVGHitList.
Comment 2 Eric Seidel (no email) 2006-01-26 16:42:07 PST
Also now in Radar:
<rdar://problem/4423939> Resizing Safari window sends Core Image off the deep end
Comment 3 Eric Seidel (no email) 2006-01-29 06:23:48 PST
The situation is much better now.  I discovered as part of fixing http://bugzilla.opendarwin.org/show_bug.cgi?id=6849 that every time we requested a filter object, we were adding it's filter elements onto the filter stack.   This caused us to quickly build a filter stack larger than core image could handle.  The performance is still poor, but much better.
Comment 4 Gregory Block 2006-02-01 02:16:20 PST
... is it just me, or are some effects being added on each time I resize this?  Nightly from the 31st...  Is that related to this?
Comment 5 Joost de Valk (AlthA) 2006-02-04 10:50:30 PST
Performance for resizing this is hellish, but it works and it's consistent it seems....
Comment 6 Alexander Kellett 2006-02-12 10:00:22 PST
as altha points out, while horribly slow this is no longer a hang.
renaming to reflect this, decreasing priority, and removing from hitlist.
Comment 7 Alexander Kellett 2006-02-14 01:48:07 PST
making hitlist again, we are too slow to ship
Comment 8 Alex Taylor 2006-04-27 02:33:08 PDT
Created attachment 7995 [details]
Slightly reduced testcase

It appears the Gaussian blur effect is causing a dramatic slow down.

Slight butchering/reduction of the SVG while still exhibiting the behaviour.
Removed buttons, text and gradient effects, leaving enough gaussian blurred objects.
Comment 9 Gavin Sherlock 2008-08-01 06:20:42 PDT
I see a little CPU usage when resizing the window when visiting:


but no performance problems.  Maybe should be closed?
Comment 10 Gavin Sherlock 2008-08-01 06:21:31 PDT
Forgot to say - tested with r35417
Comment 11 Dirk Schulze 2009-10-09 13:59:02 PDT
We can close this bug with the new implementation landed with r49402. Needs filters enabled build.