On Wednesday, April 22, 2015 at 3:58:17 AM UTC-4, James May wrote: > On 22 April 2015 at 12:51, David Anderson <--------@gmail.com> wrote: > > > To get some feedback on AsyncPanZoom we are enabling it on tonight's > > nightly, for Windows only. It will be re-disabled in the next nightly. > > > > For those unfamiliar, APZ makes scrolling responsive by pre-rendering more > > content than what is visible in the viewport [1]. This lets us present it > > asynchronously without blocking on the content thread. > > > > To use APZ you just need E10S, and to scroll with a mouse wheel or a > > trackpad/touchpad. (Arrow or page dn/up keys do not trigger APZ.) > > > > What about using the scroll bar? Is there somewhere I can see if it's > enabled/I've got the correct nightly? > > > > > > We're interested in any significant behavior changes with APZ, and > > especially any situations in which we can't pre-render content fast enough. > > In this case you might see blank white areas of the screen while scrolling > > (aka "checkerboarding"). Please file any sites you find this way against > > the "paint-fast" bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1154825 > > > > If needed you can flip the APZ pref manually with > > layers.async-pan-zoom.enabled. It requires a browser restart. > > > > If you want to test whether you have APZ working, I've made a test site > > that will jank normal Firefox pretty badly [2]. With APZ+E10S, it should > > scroll fine. > > > > [1] https://wiki.mozilla.org/Platform/GFX/APZ > > [2] http://users.alliedmods.net/~dvander/apzc.html > > _______________________________________________ > > dev-platform mailing list > > dev-platform@lists.mozilla.org > > https://lists.mozilla.org/listinfo/dev-platform > > > > -- James
about:support should show you under the "Graphics" section. Clicking the scrollbar or dragging the thumb won't route through APZ. -David _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
