304869 2026-01-02 15:35:57 -0800 [Grid] Lots of time spent in GridTrackSizingAlgorithm::accumulateIntrinsicSizesForTrack with subgrids that span lots of rows 2026-01-20 10:07:16 -0800 1 1 1 Unclassified WebKit Layout and Rendering WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=302529 https://bugs.webkit.org/show_bug.cgi?id=232176 InRadar P2 Normal --- 1 sgill26 sgill26 bfulgham ntim simon.fraser webkit-bug-importer zalan oldest_to_newest 2168955 0 477890 sgill26 2026-01-02 15:35:57 -0800 Created attachment 477890 Testcase In the attached test case we end up spending a lot of time in this function 2168956 1 webkit-bug-importer 2026-01-02 15:36:09 -0800 <rdar://problem/167456605> 2168958 2 sgill26 2026-01-02 15:42:31 -0800 Pull request: https://github.com/WebKit/WebKit/pull/56024 2169469 3 ews-feeder 2026-01-05 13:47:37 -0800 Committed 305121@main (425f9293f8d4): <https://commits.webkit.org/305121@main> Reviewed commits have been landed. Closing PR #56024 and removing active labels. 2173371 4 sgill26 2026-01-20 10:07:16 -0800 *** Bug 232176 has been marked as a duplicate of this bug. *** 477890 2026-01-02 15:35:57 -0800 2026-01-02 15:35:57 -0800 Testcase subgrid-perf.html text/html 914 sgill26 CjxodG1sPgogIDxoZWFkPgogIDxzdHlsZT4KICAgIC5ncmlkIHsKICAgICAgZGlzcGxheTogZ3Jp ZDsKICAgICAgZ3JpZC10ZW1wbGF0ZS1jb2x1bW5zOiBhdXRvOwogICAgICBib3JkZXI6IDFweCBz b2xpZCBncmVlbjsKICAgIH0KCiAgICAuc3ViZ3JpZCB7CiAgICAgIGRpc3BsYXk6IGdyaWQ7CiAg ICAgIGdyaWQtdGVtcGxhdGUtY29sdW1uczogc3ViZ3JpZDsKICAgICAgZ3JpZC10ZW1wbGF0ZS1y b3dzOiBzdWJncmlkOwogICAgICBncmlkLXJvdzogc3BhbiAyMDAwMDsKICAgIH0KICA8L3N0eWxl PgogIDwvaGVhZD4KCiAgPGJvZHk+CiAgICA8ZGl2IGNsYXNzPSJncmlkIj4KICAgICAgICA8ZGl2 IGlkPSIxIiBjbGFzcz0ic3ViZ3JpZCI+Um93PC9kaXY+CiAgICAgICAgPGRpdiBpZD0iMiIgY2xh c3M9InN1YmdyaWQiPlJvdzwvZGl2PgogICAgICAgIDxkaXYgaWQ9IjMiIGNsYXNzPSJzdWJncmlk Ij5Sb3c8L2Rpdj4KICAgICAgICA8ZGl2IGlkPSI0IiBjbGFzcz0ic3ViZ3JpZCI+Um93PC9kaXY+ CiAgICAgICAgPGRpdiBpZD0iNSIgY2xhc3M9InN1YmdyaWQiPlJvdzwvZGl2PgogICAgICAgIDxk aXYgaWQ9IjYiIGNsYXNzPSJzdWJncmlkIj5Sb3c8L2Rpdj4KICAgICAgICA8ZGl2IGlkPSI3IiBj bGFzcz0ic3ViZ3JpZCI+Um93PC9kaXY+CiAgICAgICAgPGRpdiBpZD0iOCIgY2xhc3M9InN1Ymdy aWQiPlJvdzwvZGl2PgogICAgICAgIDxkaXYgaWQ9IjkiIGNsYXNzPSJzdWJncmlkIj5Sb3c8L2Rp dj4KICAgICAgICA8ZGl2IGlkPSIxMCIgY2xhc3M9InN1YmdyaWQiPlJvdzwvZGl2PgogICAgICAg IDxkaXYgaWQ9IjExIiBjbGFzcz0ic3ViZ3JpZCI+Um93PC9kaXY+CiAgICAgICAgPGRpdiBpZD0i MTIiIGNsYXNzPSJzdWJncmlkIj5Sb3c8L2Rpdj4KICAgIDwvZGl2PgogIDwvYm9keT4KPC9odG1s Pgo=