T-PERF-MODAL-REOPEN-PRESENT-CADENCE
Business dialogs in 3.61.3 still visibly stutter on first open and replay
Verification scope
docs/known_issues.md:230
Report an issue with this entry →T-PERF-MRG10-PLAIN-TIMING-RESIDUAL
The cause of historically slow width changes in the unbroken plain chain remains unidentified
Verification scope
docs/known_issues.md:350
Report an issue with this entry →T-PERF-NO-BACKEND-IFC-ATTEMPT-WASTED
Paragraphs with atomic inline boxes in documents without a backend waste a full-paragraph attempt before falling back to individual dispatch on every layout pass
Verification scope
docs/known_issues.md:225
Report an issue with this entry →T-PERF-P7-008
Governance of offline performance gates
Verification scope
docs/known_issues.md:235
Report an issue with this entry →T-PERF-P7-009
Performance-module test debt
Verification scope
docs/known_issues.md:236
Report an issue with this entry →T-PERF-P7-010
Drift in performance-module documentation and contracts
Verification scope
docs/known_issues.md:237
Report an issue with this entry →T-PERF-P8-BASELINE
Experimental-matrix workload ceilings and local timing baselines
Verification scope
docs/known_issues.md:238
Report an issue with this entry →T-PERF-PARAGRAPH-MINCONTENT-WHITESPACE-CLASS
Text containing ASCII spaces still requires a separate paragraph probe for min-content
Verification scope
docs/known_issues.md:222
Report an issue with this entry →T-PERF-RESIZE-GRID-IN-FLEX-BASIS-REMEASURE
When dragging the width, a grid inside a flex container receives a full layout, including a minimum-column trial, during flex-basis measurement and is measured twice per frame
Verification scope
docs/known_issues.md:227
Report an issue with this entry →T-PERF-RESIZE-PARAGRAPH-STEADY-RESIDUAL
Remaining paragraph reflow during steady-state width dragging (center/right alignment anchors and soft wrapping), plus the first-frame memo-table storage gate
Verification scope
docs/known_issues.md:226
Report an issue with this entry →T-PERF-ROOT-FONT-CHANGE-FULL-RESTYLE-AND-REBUILD
Root font-size changes restyle all descendants and fully rebuild layout regardless of whether rem is used
Verification scope
docs/known_issues.md:352
Report an issue with this entry →T-PERF-RTL-PLACEHOLDER-REORDER-EXTRA-LAYOUT
Paragraphs requiring placeholder permutation into visual slots incur another layout pass, repeating the early function work and run population
Verification scope
docs/known_issues.md:351
Report an issue with this entry →T-PERF-SELECTIVE-PASS-REMAINING-WALKS
Remaining full-tree walks during selective descent: clearing dirty flags, synchronizing scroll positions, collecting absolute-positioned descendants for each ancestor, and applying position offsets
Verification scope
docs/known_issues.md:220
Report an issue with this entry →T-PERF-SHAPE-CACHE-HIT-ATTRIBUTION
Shaping-cache hit counts do not reconcile with misses caused only by width changes
Verification scope
docs/known_issues.md:221
Report an issue with this entry →T-PERF-SMALL-CHANGE-FULL-DL-RERECORD
Small non-animation changes (hovering one button, typing one character, caret blinking, or scrolling) rerecord the entire page's DisplayList and recompute its full content hash
Verification scope
docs/known_issues.md:234
Report an issue with this entry →T-PERF-SOFT-HYPHEN-OVERFLOW-RELAYOUT-PER-HYPHEN
When a soft hyphen does not fit, each affected line triggers character replacement and a full paragraph relayout
Verification scope
docs/known_issues.md:355
Report an issue with this entry →T-PERF-TEXTAREA-REWRAP-REBUILDS-VISIBLE-LINES
Typing within a textarea paragraph and pushing a word onto the next line rebuilds the paragraph once for each subsequent visible line
Verification scope
docs/known_issues.md:358
Report an issue with this entry →T-PERF-WEBKIT-BOX-ANONYMOUS-ITEM-FLEX-MEASURE-PASSES
Reflowing an unclamped -webkit-box with inline elements is about 4 times slower than before the fix and 1.6 times slower than an ordinary block with the same content (the measured cost of A179)
Verification scope
docs/known_issues.md:224
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