This is in Radar as <rdar://problem/8460238>. -[WebView _scheduleCompositingLayerSync] should ensure that the runloop is woken up if the RLO is already scheduled. Otherwise, layers might not get synced for a while until some other event wakes the run loop, causing rendering delays.
Created attachment 68304 [details] suggested patch
Comment on attachment 68304 [details] suggested patch View in context: https://bugs.webkit.org/attachment.cgi?id=68304&action=review > WebKit/mac/WebView/WebView.mm:5874 > + // Make sure we wake up the loop or the observer could be delayed until some other source fires Period at the end of the sentence please.
Created attachment 68306 [details] Address feedback from Simon Fraser, add a period at the end of a comment.
Comment on attachment 68306 [details] Address feedback from Simon Fraser, add a period at the end of a comment. Clearing flags on attachment: 68306 Committed r68028: <http://trac.webkit.org/changeset/68028>
All reviewed patches have been landed. Closing bug.