NEW180025
Avoid traversing the layer/render tree multiple times when painting the different phases 
https://bugs.webkit.org/show_bug.cgi?id=180025
Summary Avoid traversing the layer/render tree multiple times when painting the diffe...
Said Abou-Hallawa
Reported 2017-11-26 18:37:14 PST
One way to optimize the paintings lashes is to have the renderers paint themselves into intermediate display lists. Once the painting to the display lists finishes, these display lists will be played back to the painting GraphicsContext in the order of the painting phases.
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Add attachment proposed patch, testcase, etc.
Said Abou-Hallawa
Comment 1 2017-11-26 18:48:14 PST
<rdar://problem/34968524>
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