Comment 3 for bug 1657755

If we reintroduce bug 1369763 (which is conveniently still open) then that potentially creates higher latency in some rare cases where the server doesn't get sufficient CPU/GPU time to keep up with the client.

If we do nothing then overlays are disabled but we also have a stronger guarantee of lower latency (with higher GPU usage).

I'm open to either but have been thinking for weeks that we should just partially revert r3759, reintroducing bug 1369763. Then we can live with it a little while and should prioritize fixing it. See also bug 1653625 which sounds like a recurrence of bug 1373696.