Try to coalesce some composited layers. If subtree compositing flag is off, and the layer is fully inside the ancestor, there is no need to do the overlap test. This will reduce a lot of sub layers. --klobag
Created attachment 128567 [details] patch
I think this might be a duplicate of what smfr is trying to do in https://bugs.webkit.org/show_bug.cgi?id=50192. smfr: What's the status on that patch?
Comment on attachment 128567 [details] patch Attachment 128567 [details] did not pass chromium-ews (chromium-xvfb): Output: http://queues.webkit.org/results/11600483 New failing tests: compositing/reflections/nested-reflection-transformed2.html compositing/reflections/nested-reflection-transformed.html compositing/reflections/reflection-on-composited.html
*** This bug has been marked as a duplicate of bug 50192 ***