64639 2011-07-15 16:41:23 -0700 Too much repainting when scrolling with fixed position element 2011-07-15 16:45:05 -0700 1 1 1 Unclassified WebKit Layout and Rendering 528+ (Nightly build) All All NEW HasReduction P2 Normal --- 1 jchaffraix webkit-unassigned simon.fraser oldest_to_newest 438057 0 jchaffraix 2011-07-15 16:41:23 -0700 When scrolling on a page with a fixed position element, it looks like we repaint the whole screen. I guess this can be improved. The test case is similar to LayoutTests/repaint/fixed.html so it may be related to bug 25269. 438058 1 101069 jchaffraix 2011-07-15 16:43:26 -0700 Created attachment 101069 Paint test case - show case the behavior 438059 2 101070 jchaffraix 2011-07-15 16:45:05 -0700 Created attachment 101070 Generated PNG output on Chromium-linux 101069 2011-07-15 16:43:26 -0700 2011-07-15 16:43:26 -0700 Paint test case - show case the behavior fixed-scroll-simple.html text/html 897 jchaffraix PGh0bWw+CjxoZWFkPgogICAgPHRpdGxlPjwvdGl0bGU+CiAgICA8c2NyaXB0IHR5cGU9InRleHQv amF2YXNjcmlwdCI+CiAgICAgICAgZnVuY3Rpb24gcnVuUmVwYWludFRlc3QoKQogICAgICAgIHsK ICAgICAgICAgICAgaWYgKHdpbmRvdy5sYXlvdXRUZXN0Q29udHJvbGxlcikgewogICAgICAgICAg ICAgICAgZG9jdW1lbnQuYm9keS5vZmZzZXRUb3A7CiAgICAgICAgICAgICAgICBsYXlvdXRUZXN0 Q29udHJvbGxlci5kaXNwbGF5KCk7CiAgICAgICAgICAgICAgICByZXBhaW50VGVzdCgpOwogICAg ICAgICAgICB9IGVsc2UgewogICAgICAgICAgICAgICAgc2V0VGltZW91dChyZXBhaW50VGVzdCwg 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