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User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:42.0) Gecko/20100101 Firefox/42.0 Build ID: 20150806030205 Steps to reproduce: * Visit http://kangax.github.io/compat-table/es6/ * Scroll the page I'm running latest Nightly on Windows 7 64-bit. Actual results: The scrolling is janky. By recording a session with the preformance devtools you can see that almost all time is spent in painting and that we get a very low avg fps. Expected results: The scrolling should be smooth as in IE 11 and Chrome 44.
Pushlog: https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=9b157630e5ab&tochange=697c4b245de0 Triggered by: 697c4b245de0 Tim Nguyen — Bug 1057180 - Enable CSS Filters by default. r=dbaron
Status: UNCONFIRMED → NEW
status-firefox39: --- → affected
status-firefox40: --- → affected
status-firefox41: --- → affected
status-firefox42: --- → affected
status-firefox-esr31: --- → unaffected
status-firefox-esr38: --- → affected
Ever confirmed: true
profile log http://people.mozilla.org/~bgirard/cleopatra/#report=9241efd053ec5b65d53c1480d10734dd530eb4d2
Component: Untriaged → Layout
Summary: Poor scrolling performance on http://kangax.github.io/compat-table/es6/ → Poor scrolling performance on http://kangax.github.io/compat-table/es6/, due to CSS filter rendering
Deferring needinfo to Markus, since I'm not working on Firefox these days.
This one needs a closer look...
To Tobias for profiling and diagnosis.
Assignee: nobody → tschneider
After profiling and talking to Markus, the poor scrolling performance seems to be related to https://bugzilla.mozilla.org/show_bug.cgi?id=975644, not canvas filters.
I think we can close this as a dupe of Bug 1267898 (which depends on Bug 975644), since it's really about "fake" position: sticky performance (because we don't support pos:sticky on thead yet). (Or we can close the other as a dupe of this and update the title) WDYT Tobias?
Status: NEW → RESOLVED
Last Resolved: a year ago
Resolution: --- → DUPLICATE
Duplicate of bug: 1267898
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