On Sat, Sep 7, 2013 at 7:02 AM, Jeff Gilbert <jgilb...@mozilla.com> wrote:

> Could you clarify number 2? It's a little dense.
>

A better way to state it is this: every layer tree update by the main
thread eventually gets a response in the form of a vsync-driven request to
tick the corresponding refresh driver. So, assuming the "non-main thread"
above is the compositor thread, the set of windows composited in step 4 is
the set of windows notified in step 2 in the next iteration.

Rob
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