1023457 - Scrolling Twitter on the Flame is super janky

Status: RESOLVED DUPLICATE of bug 1006084

(Core :: Graphics: Layers, defect)

Description

[Chris Lord [:cwiiis]]

If you log in to Twitter and fling the tweet list, the resulting scrolling is *very* janky. This is completely smooth in 1.4, it almost seems like Gralloc isn't being used and we're getting upload pauses.

Given the popularity of Twitter, I think this should be a blocker. I imagine this also manifests in many other places too, I've just not had the time to do thorough testing.

I'll see about getting a profile tomorrow.

Comment 1

[Chris Lord [:cwiiis]]

Locking and then unlocking the phone 'fixes' the issue - I suspect that a layer that should be a tiled layer is initially an unscrollable layer and then is promoted to a scrollable layer but retains the old layer and doesn't become tiled. I also suspect that the displayport is bigger than the max texture size, and so we are indeed missing the gralloc path.

This is all just an educated guess, but I'll look at this properly tomorrow and see if there's a quick/simple fix.

Comment 2

[bhavana bajaj [:bajaj]]

Blocking as this is a key app and a regression. Hopefully landing of 1006084 can fix this, lets see what happens...

Comment 3

[Milan Sreckovic [:milan] (needinfo for best results)]

Assigning to Chris assuming bug 1006084 is a dupe; if it turns out not to be, pass it back to me.

Comment 4

[Milan Sreckovic [:milan] (needinfo for best results)]

Is this issue gone now that bug 1006084 is fixed?

Comment 5

[Ben Kelly [:bkelly, not reviewing]]

So on my v2.0 flame with buildid 20140617000201 it seems twitter is still janky.  In addition, the lock/unlock work around from comment 1 does not seem to fix the jank any more.

I confirmed this build contains this fix, unfortunately.  The nightly I used is:

  https://pvtbuilds.mozilla.org/pvt/mozilla.org/b2gotoro/nightly/mozilla-aurora-flame/2014/06/2014-06-17-00-02-01/

I think sources.xml points to this gecko commit:

  http://git.mozilla.org/?p=releases/gecko.git;a=commit;h=bcfc4f811852631e99e9393976a6ea5d87621105

Which is hg rev 7f309a3a4d3d which contains this fix.

Comment 6

[Ben Kelly [:bkelly, not reviewing]]

Actually, somehow tiling got disabled in settings on my phone.  I certainly didn't do that on purpose.

Once I re-enabled tiling the jank appears to be fixed, even on first app open.

Comment 7

[Chris Lord [:cwiiis]]

Based on my own testing and comment #6, duping this to bug 1006084.