RESOLVED FIXED 208972
REGRESSION (r254054): finance.google.com watch list renders initially then disappears for 5+ seconds before reappearing 
https://bugs.webkit.org/show_bug.cgi?id=208972
Summary REGRESSION (r254054): finance.google.com watch list renders initially then di...
Simon Fraser (smfr)
Reported 2020-03-11 20:21:44 PDT
REGRESSION (r254054): finance.google.com watch list renders initially then disappears for 5+ seconds before reappearing
Attachments
Patch (7.85 KB, patch)
2020-03-11 20:29 PDT, Simon Fraser (smfr) 		zalan: review+
DetailsFormatted DiffDiff
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Simon Fraser (smfr)
Comment 1 2020-03-11 20:29:09 PDT
Created attachment 393333 [details] Patch
zalan
Comment 2 2020-03-11 20:33:50 PDT
Comment on attachment 393333 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=393333&action=review > Source/WebCore/rendering/style/RenderStyle.cpp:822 > + if (m_boxData->hasAutoUsedZIndex() != other.m_boxData->hasAutoUsedZIndex()) > + return true; It's a bit odd though that z-index change needs layout (and visual overflow computation as well. LFC should be better at this.)
Maciej Stachowiak
Comment 3 2020-03-11 22:17:02 PDT
Are the bot failures real?
Maciej Stachowiak
Comment 4 2020-03-11 22:18:18 PDT
WK1 and WK2 both showing css3/blending/repaint/blend-mode-isolate-stacking-context.html as failing, sounds possibly caused by this bug.
Simon Fraser (smfr)
Comment 5 2020-03-11 22:54:49 PDT
(In reply to Maciej Stachowiak from comment #4) > WK1 and WK2 both showing > css3/blending/repaint/blend-mode-isolate-stacking-context.html as failing, > sounds possibly caused by this bug. Changes in the order of repaints, which is not surprising. I'll verify that the rendering is correct, and rebaseline.
Antoine Quint
Comment 6 2020-03-12 01:01:27 PDT
<rdar://problem/59727171>
Simon Fraser (smfr)
Comment 7 2020-03-12 10:15:55 PDT
https://trac.webkit.org/changeset/258336/webkit
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