Created attachment 663634 [details] about:support as text file I experience a few seconds of jank when opening a google groups' group page such as mozilla.dev.platform. A gecko profiler profile for this is available here: http://people.mozilla.com/~bgirard/cleopatra/?report=bd345397daed044bf60792452d9c80edb9d4a235 My about:support has been attached as a text file.
I notice this on x64 Windows 7 on all Google Blogspot blogs that use widgets and default themes.
Here's a profile for opening the "my groups" page at google groups. http://people.mozilla.com/~bgirard/cleopatra/#report=d0d1a2602885fe296ab0d64c6c4be88e27415b2c Most of the jank period seems to be spent in an Evaluate String operation. Profile was recorded on an Intel E8500 based machine with win7 x64. 06/02 moz-central nightly win32 build. https://groups.google.com/forum/#!myforums
even opening the gmail page for the first time causes ~1-1.5 seconds jank. Profile : http://people.mozilla.com/~bgirard/cleopatra/#report=aad761f1529578c57c9fee68ce3ceb8b60288de3 IIRC this is already being tracked in another bug. Should be P1, IMO.
see also : bug 789598
That profile was recorded on an Intel E8500 based machine running todays moz central nightly win32 build, on win7 x64.
http://people.mozilla.com/~bgirard/cleopatra/#report=c5caf961350d8ccb46dcd8825fc8bc741f023f85 In google groups, switching from "compact list view" to "standard view".
Can you still reproduce? https://groups.google.com/forum/#!topic/mozilla.dev.platform/fEUHUse_qb8 takes a long time to load. But I do not experience jank. This is with a current nightly and e10s enabled, heavily loaded with 400 tabs I also cannot reproduce related bug 924001, nor bug 802731
with e10s and APZC, this is fine now.
Looks like there is still a little bit of jank (like less than 500 ms), but it is much better.
Thanks for the update