Go to treeherder and scroll. We always checkerboard.

Making tile sizes on OS X 1024x1024, which is the same size as Safari. If we change the tile sizes to 1024x1024 on a retina 15" mbp, we no longer checkerboard while scrolling treeherder.

From a conversation with Jeff, On high dpi devices on OS X, we should make tile sizes the same as Safari. However, until we can use tiles for scrollable content only, we'd waste a lot of memory generating large tiles for non-scrollable content.

(In reply to Mason Chang [:mchang] from comment #1) > Making tile sizes on OS X 1024x1024, which is the same size as Safari. If we > change the tile sizes to 1024x1024 on a retina 15" mbp, we no longer > checkerboard while scrolling treeherder. I should clarify, I forgot to re-enable APZ, we still checkerboard.

Two Profiles with OS X 10.10: CoreGraphics http://people.mozilla.org/~bgirard/cleopatra/#report=b0dc1d877862d4e2e89eafde7eb43ac5c2dc956d Skia http://people.mozilla.org/~bgirard/cleopatra/#report=84019223b396d726cf2011ea549a1c4cb2cdbd27 Spend a lot of time painting: nsDisplayButtonBorderBackground nsDisplayText nsDisplayTableBorderBackground Also spend a lot of time generating display lists.

Here's treeherder on Windows 7: http://people.mozilla.org/~bgirard/cleopatra/#report=30b3f0662479d5bbaaaaea452164a5302bb393b3 Still a lot of time displaying text. It looks like flushing is just very expensive... Not sure why.

Closing old bugs.