Updates:
Status: Upstream
Comment #11 on issue 25741 by [email protected]: scrolling jank in gmail
http://code.google.com/p/chromium/issues/detail?id=25741
I've identified what I believe to be the root cause, turns out it doesn't
have anything to do with
scrolling. A bit of javascript that runs periodically on gmail is
triggering this:
https://bugs.webkit.org/show_bug.cgi?id=30988
and freezing up the UI thread for 500-2500ms (depending on how many nodes
are live in the DOM,
etc). Since the UI thread is locked it is unable to respond to repaint the
screen and so scrolling appears
to freeze up. I've marked the bug 'UPSTREAM' because of the WebKit bug, I
will also follow up with the
appropriate folks at GMail.
It is possible that there are other periodic tasks that cause the UI to
lock up in gmail, but after some
observation it seems like this one is very common relative to anything else
that might be going on.
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