T-PERF-MODAL-REOPEN-PRESENT-CADENCE
T-PERF-MRG10-PLAIN-TIMING-RESIDUAL
T-PERF-NO-BACKEND-IFC-ATTEMPT-WASTED
T-PERF-P7-008
T-PERF-P7-009
T-PERF-P7-010
T-PERF-P8-BASELINE
T-PERF-PARAGRAPH-MINCONTENT-WHITESPACE-CLASS
T-PERF-RESIZE-GRID-IN-FLEX-BASIS-REMEASURE
T-PERF-RESIZE-PARAGRAPH-STEADY-RESIDUAL
T-PERF-ROOT-FONT-CHANGE-FULL-RESTYLE-AND-REBUILD
T-PERF-RTL-PLACEHOLDER-REORDER-EXTRA-LAYOUT
T-PERF-SELECTIVE-PASS-REMAINING-WALKS
T-PERF-SHAPE-CACHE-HIT-ATTRIBUTION
T-PERF-SMALL-CHANGE-FULL-DL-RERECORD
T-PERF-SOFT-HYPHEN-OVERFLOW-RELAYOUT-PER-HYPHEN
T-PERF-TEXTAREA-REWRAP-REBUILDS-VISIBLE-LINES
T-PERF-WEBKIT-BOX-ANONYMOUS-ITEM-FLEX-MEASURE-PASSES
无 clamp、带行内元素的 -webkit-box 每次重排比修复前慢约 4 倍、比同内容普通块慢约 1.6 倍（A179 的已量清代价）
验证范围
docs/known_issues.md:224
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