204255 2019-11-15 15:23:13 -0800 Block layout invalidation logic triggers excessive layout on height percentage descendants 2019-11-18 13:30:16 -0800 1 1 1 Unclassified WebKit Layout and Rendering WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 zalan zalan bfulgham commit-queue esprehn+autocc ews-watchlist glenn kondapallykalyan pdr simon.fraser zalan oldest_to_newest 1590704 0 zalan 2019-11-15 15:23:13 -0800 rdar://problem/57236490 1591113 1 383762 zalan 2019-11-18 10:47:39 -0800 Created attachment 383762 Patch 1591122 2 383762 simon.fraser 2019-11-18 11:09:15 -0800 Comment on attachment 383762 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=383762&action=review > Source/WebCore/ChangeLog:4 > + https://bugs.webkit.org/show_bug.cgi?id=204255 Radar > Source/WebCore/ChangeLog:14 > + This patch attempts to optimize the height percentage invalidation logic by skipping boxes with out-of-flow ancestors. > + The normal box invalidation logic works on parent-child level (a.k.a when the parent is dirty it walks its direct children list and marks them dirty if needed). > + However percent height values require containing block-child type of invalidation which atm we manage using a "percentHeightDescendantsMap". > + percentHeightDescendantsMap contains all the height percentage descendants and as part of the box invalidation the block container always marks all of these special descendants dirty. > + This leads to excessive and unnecessary layouts in certain cases when the "walk the ancestor chain and mark boxes dirty all the way to the RenderView" code ends up descending back > + to these height percentage boxes. > + We could optimize it slightly by checking if there's a height percentage containing block in the ancestor chain. In such cases, we know that the descendant's height used value computation will eventually stop at this out-of-flow containing block. Tidy this up a bit! > Source/WebCore/rendering/RenderBlock.cpp:825 > + auto descendantNeedsLayout = true; Nooooo > LayoutTests/fast/block/height-percentage-descendants-with-absolute-pos-containingblock.html:11 > + <img style="background-color: black; filter: blur(20px); height: 100%;" src="broken.jpg"> Don't need the blur. 1591140 3 383766 zalan 2019-11-18 11:32:22 -0800 Created attachment 383766 Patch 1591194 4 383766 commit-queue 2019-11-18 12:55:33 -0800 Comment on attachment 383766 Patch Rejecting attachment 383766 from commit-queue. Failed to run "['/Volumes/Data/EWS/WebKit/Tools/Scripts/webkit-patch', '--status-host=webkit-queues.webkit.org', '--bot-id=webkit-cq-01', 'validate-changelog', '--check-oops', '--non-interactive', 383766, '--port=mac']" exit_code: 1 cwd: /Volumes/Data/EWS/WebKit ChangeLog entry in LayoutTests/ChangeLog contains OOPS!. Full output: https://webkit-queues.webkit.org/results/13264835 1591195 5 383779 zalan 2019-11-18 12:57:10 -0800 Created attachment 383779 Patch 1591209 6 383779 commit-queue 2019-11-18 13:30:14 -0800 Comment on attachment 383779 Patch Clearing flags on attachment: 383779 Committed r252562: <https://trac.webkit.org/changeset/252562> 1591210 7 commit-queue 2019-11-18 13:30:16 -0800 All reviewed patches have been landed. Closing bug. 383762 2019-11-18 10:47:39 -0800 2019-11-18 11:32:21 -0800 Patch bug-204255-20191118104738.patch text/plain 6122 zalan U3VidmVyc2lvbiBSZXZpc2lvbjogMjUyNTQ0CmRpZmYgLS1naXQgYS9Tb3VyY2UvV2ViQ29yZS9D aGFuZ2VMb2cgYi9Tb3VyY2UvV2ViQ29yZS9DaGFuZ2VMb2cKaW5kZXggYjEzODlkOGYwOWFkZTA1 NTliMTIzNzY3NjllYzY5YmZkNWQ4NzcxZS4uOGI2ODg4OTU5NmQzZDhhZTQxZjE2YzU5YzU4Mzhh OTZiNTBkY2FiNSAxMDA2NDQKLS0tIGEvU291cmNlL1dlYkNvcmUvQ2hhbmdlTG9nCisrKyBiL1Nv dXJjZS9XZWJDb3JlL0NoYW5nZUxvZwpAQCAtMSwzICsxLDIzIEBACisyMDE5LTExLTE4ICBaYWxh biBCdWp0YXMgIDx6YWxhbkBhcHBsZS5jb20+CisKKyAgICAgICAgQmxvY2sgbGF5b3V0IGludmFs aWRhdGlvbiBsb2dpYyB0cmlnZ2VycyBleGNlc3NpdmUgbGF5b3V0IG9uIGhlaWdodCBwZXJjZW50 YWdlIGRlc2NlbmRhbnRzCisgICAgICAgIGh0dHBzOi8vYnVncy53ZWJraXQub3JnL3Nob3dfYnVn LmNnaT9pZD0yMDQyNTUKKworICAgICAgICBSZXZpZXdlZCBieSBOT0JPRFkgKE9PUFMhKS4KKwor ICAgICAgICBUaGlzIHBhdGNoIGF0dGVtcHRzIHRvIG9wdGltaXplIHRoZSBoZWlnaHQgcGVyY2Vu dGFnZSBpbnZhbGlkYXRpb24gbG9naWMgYnkgc2tpcHBpbmcgYm94ZXMgd2l0aCBvdXQtb2YtZmxv 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