On Tuesday 2015-03-31 23:28 -0700, Jet Villegas wrote: > \o/ Hooray! This one took a lot of effort from many people across the > Rendering teams. Super-Happy to see it land.
Well, it actually didn't, due to test failures introduced sometime in the past 3 days. Hopefully it will reland soon, though. -David > On Tuesday, March 31, 2015, L. David Baron <[email protected]> wrote: > > > I just landed (on mozilla-inbound) a patch for > > https://bugzilla.mozilla.org/show_bug.cgi?id=980770 that enables > > off-main-thread (OMT) animations on nightly and aurora. This > > feature has previously been enabled on Firefox OS since Firefox OS > > 1.0, but until now it has been disabled elsewhere. > > > > Off-main-thread animations means that we run animations of some CSS > > properties (currently only opacity and transform) on the compositor > > thread, and stop doing style updates on the main thread. Running > > the updates on the compositor thread makes the animations run more > > smoothly (since their smoothness is no longer dependent on other > > things not hogging the main thread), and not doing the style updates > > on the main thread reduces the amount of work that we do (rather > > than increasing it). > > > > Depending on merge timing, and presuming that the change isn't > > backed out, this might hit nightly either tomorrow (April 1) or > > Thursday (April 2). > > > > Regressions from enabling it should be made to block bug 980770. > > > > If you want to test if something is a regression from it, toggle the > > pref "layers.offmainthreadcomposition.async-animations". (Reloading > > the page is probably needed for it to take effect fully, although it > > shouldn't require a restart, unless it's a bug in the Firefox UI.) > > > > Since this is the beginning of the six-week release cycle, I'm > > hoping that we'll be able to flip the pref unconditionally by the > > end of this cycle and let it ride the trains to release. However, > > it's currently enabled only for nightly and aurora. > > > > -David > > > > -- > > 𝄞 L. David Baron http://dbaron.org/ 𝄂 > > 𝄢 Mozilla https://www.mozilla.org/ 𝄂 > > Before I built a wall I'd ask to know > > What I was walling in or walling out, > > And to whom I was like to give offense. > > - Robert Frost, Mending Wall (1914) > > -- 𝄞 L. David Baron http://dbaron.org/ 𝄂 𝄢 Mozilla https://www.mozilla.org/ 𝄂 Before I built a wall I'd ask to know What I was walling in or walling out, And to whom I was like to give offense. - Robert Frost, Mending Wall (1914)
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