WebKit Bugzilla
New
Browse
Log In
×
Sign in with GitHub
or
Remember my login
Create Account
·
Forgot Password
Forgotten password account recovery
RESOLVED FIXED
104693
REGRESSION: Very poor performance on IE's Chalkboard benchmark
https://bugs.webkit.org/show_bug.cgi?id=104693
Summary
REGRESSION: Very poor performance on IE's Chalkboard benchmark
Tim Horton
Reported
2012-12-11 11:46:09 PST
http://ie.microsoft.com/testdrive/Performance/Chalkboard/
A vague history of our performance on this test: a) bad (15 seconds to completion, pretty jerky) before SVGImageCache (
http://trac.webkit.org/changeset/99539
) b) sort of OK (5 seconds to completion, relatively smooth) after SVGImageCache, but pixelated. c) absolutely horrific (hundreds of seconds to completion, completely stalling for seconds at a time) after Niko's fix to actually use the right image size. But not pixelated anymore. (
http://trac.webkit.org/changeset/112229
) <
rdar://problem/11769350
>
Attachments
Add attachment
proposed patch, testcase, etc.
Florin Malita
Comment 1
2012-12-11 11:54:16 PST
I believe Philip is taking a hard look at the SVG image cache :) FWIW, bypassing the SVG image cache completely (by hacking SVGImageCache::lookupOrCreateBitmapImageForRenderer to always return Image::nullImage for example) fixes this issue (runs in under 5s on my workstation, not pixelated).
Tim Horton
Comment 2
2012-12-11 11:55:51 PST
(In reply to
comment #1
)
> I believe Philip is taking a hard look at the SVG image cache :)
That is *fantastic* news.
> FWIW, bypassing the SVG image cache completely (by hacking SVGImageCache::lookupOrCreateBitmapImageForRenderer to always return Image::nullImage for example) fixes this issue (runs in under 5s on my workstation, not pixelated).
Heh, good to know!
Tim Horton
Comment 3
2013-01-04 18:07:03 PST
(In reply to
comment #2
)
> (In reply to
comment #1
) > > I believe Philip is taking a hard look at the SVG image cache :) > > That is *fantastic* news.
pdr, do you have a bug tracking your work?
> > FWIW, bypassing the SVG image cache completely (by hacking SVGImageCache::lookupOrCreateBitmapImageForRenderer to always return Image::nullImage for example) fixes this issue (runs in under 5s on my workstation, not pixelated). > > Heh, good to know!
Philip Rogers
Comment 4
2013-01-04 18:34:42 PST
(In reply to
comment #3
)
> (In reply to
comment #2
) > > (In reply to
comment #1
) > > > I believe Philip is taking a hard look at the SVG image cache :) > > > > That is *fantastic* news. > > pdr, do you have a bug tracking your work?
I've been plugging away at this but our image cache is really not well :/ My current plan is to get the cache into a decent, working state and then switch it over to be non-image-based. I went ahead and filed several of the larger bugs:
https://bugs.webkit.org/show_bug.cgi?id=106156
https://bugs.webkit.org/show_bug.cgi?id=106158
https://bugs.webkit.org/show_bug.cgi?id=106159
(this is the imagebuffer change)
Philip Rogers
Comment 5
2013-02-14 12:18:32 PST
(In reply to
comment #4
)
> (In reply to
comment #3
) > > (In reply to
comment #2
) > > > (In reply to
comment #1
) > > > > I believe Philip is taking a hard look at the SVG image cache :) > > > > > > That is *fantastic* news. > > > > pdr, do you have a bug tracking your work? > > I've been plugging away at this but our image cache is really not well :/ My current plan is to get the cache into a decent, working state and then switch it over to be non-image-based. > > I went ahead and filed several of the larger bugs: >
https://bugs.webkit.org/show_bug.cgi?id=106156
>
https://bugs.webkit.org/show_bug.cgi?id=106158
>
https://bugs.webkit.org/show_bug.cgi?id=106159
(this is the imagebuffer change)
We now pass the IE chalkboard demo in 9s at 1280x1024!
Note
You need to
log in
before you can comment on or make changes to this bug.
Top of Page
Format For Printing
XML
Clone This Bug