Actually, forget just facebook, I'm seeing this on lots of sites. It exhibits quite badly on wiki.mozilla.org too, for example.
--Chris On Wed, Apr 22, 2015 at 10:06 AM, Christopher Lord <cl...@mozilla.com> wrote: > Enabled it manually and this is so much nicer... Can't wait for this to be > the default :) Some odd behaviour I've noticed already, on Facebook.com the > site seems to occasionally layout as if the scroll-bar wasn't there (so > underneath it), and it seems to flip randomly as you scroll, for a while. > Only seems to happen a short time during/after load though? > > --Chris > > On Wed, Apr 22, 2015 at 8:56 AM, James May <m...@fowlsmurf.net> wrote: > >> On 22 April 2015 at 12:51, David Anderson <bailo...@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 >> _______________________________________________ >> dev-platform mailing list >> dev-platform@lists.mozilla.org >> https://lists.mozilla.org/listinfo/dev-platform >> > > _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
