RESOLVED FIXED 6713
resizing SVG with blur filter is incredibly slow 
https://bugs.webkit.org/show_bug.cgi?id=6713
Summary resizing SVG with blur filter is incredibly slow
Eric Seidel (no email)
Reported 2006-01-22 03:32:30 PST
Resizing Safari window sends CoreImage off the deep end http://jan.kollhof.net/projects/svg/examples/aqua.svg 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.
Attachments
Slightly reduced testcase (5.11 KB, image/svg+xml)
2006-04-27 02:33 PDT, Alex Taylor 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Eric Seidel (no email)
Comment 1 2006-01-26 16:20:17 PST
This is a reproducible crasher for SVG. Adding to the SVGHitList.
Eric Seidel (no email)
Comment 2 2006-01-26 16:42:07 PST
Also now in Radar: <rdar://problem/4423939> Resizing Safari window sends Core Image off the deep end
Eric Seidel (no email)
Comment 3 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.
Gregory Block
Comment 4 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?
Joost de Valk (AlthA)
Comment 5 2006-02-04 10:50:30 PST
Performance for resizing this is hellish, but it works and it's consistent it seems....
Alexander Kellett
Comment 6 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.
Alexander Kellett
Comment 7 2006-02-14 01:48:07 PST
making hitlist again, we are too slow to ship
Alex Taylor
Comment 8 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.
Gavin Sherlock
Comment 9 2008-08-01 06:20:42 PDT
I see a little CPU usage when resizing the window when visiting: http://jan.kollhof.net/projects/svg/examples/aqua.svg but no performance problems. Maybe should be closed?
Gavin Sherlock
Comment 10 2008-08-01 06:21:31 PDT
Forgot to say - tested with r35417
Dirk Schulze
Comment 11 2009-10-09 13:59:02 PDT
We can close this bug with the new implementation landed with r49402. Needs filters enabled build.
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