|Summary:||REGRESSION (r155977): Very stuttery 3D css animation on jtechcommunications.com|
|Component:||Animations||Assignee:||Simon Fraser (smfr) <simon.fraser>|
|Severity:||Normal||CC:||ap, benjamin, dino, jonlee, mhahnenberg, simon.fraser|
|Version:||528+ (Nightly build)|
|OS:||OS X 10.9|
Description pmilvich 2014-05-22 08:07:55 PDT
In the nightly build for webkit the 3d portion of the animation on the home page of http://www.jtechcommunications.com suffers from bad performance. This animation is nice and smooth in Safari 7.0.3. The animation is using the rekapi library (http://rekapi.com) to dynamically create the css animation code and inject it as a style. I suspect it's related to the latest work on the JIT css. Disabling the dynamic css generation and simply setting the values speeds it up on the nightly build, though it is still slower than Safari 7.0.3 w/o the css. (w/o access to the code you can get the non-css generating version by setting the user agent to be chrome - we only had the css version enabled on webkit for safari)
Comment 1 Alexey Proskuryakov 2014-05-22 11:41:25 PDT
I see WebProcess use a lot of CPU time, and frequently pause (sometimes for a second or so). Regressing this, it looks like <http://trac.webkit.org/r155977>.
Comment 3 Tim Horton 2014-05-22 16:56:34 PDT
Comment on attachment 231920 [details] Patch Very sad :(
Comment 5 Mark Hahnenberg 2014-05-23 11:06:37 PDT
(In reply to comment #4) > https://trac.webkit.org/r169229 This appears to have broken the following tests on the WK2 bots: compositing/tiling/rotated-tiled-clamped.html compositing/tiling/rotated-tiled-preserve3d-clamped.html Here are the results: http://build.webkit.org/results/Apple%20Mavericks%20Release%20WK2%20(Tests)/r169229%20(5896)/results.html Here is the build history that shows it regressed after this revision: http://build.webkit.org/builders/Apple%20Mavericks%20Release%20WK2%20(Tests)?numbuilds=50
Comment 6 Simon Fraser (smfr) 2014-05-23 11:13:57 PDT
I'll rebaseline those.