The production guard now ends the burst only on a non-consecutive repeat
(A -> B -> A), so a window needing a second re-measure is not mistaken for
oscillation. Update the structural assertion to that condition.
Replace the flat 2-render burst cap with cycle-aware tracking: unseen
monotonic window keys proceed (genuine convergence A->B->C->settled is
never capped), while repeated oscillating keys (A->B->A->B) terminate the
burst so the rAF/measure loop stays bounded. Thread an internal-measurement
provenance marker through both rAF layers into renderMessages() and reset
burst state on every unmarked (externally initiated) render trigger, so a
pending internal callback can never starve a legitimate new cycle.
_scheduleMessageVirtualMeasurementRefresh() reset _messageVirtualMeasurementRetryCount
every time _messageVirtualMeasurementCycleKey changed. When WebKit alternates
between two measured window-metric sets (A -> B -> A -> B) after
getBoundingClientRect(), each key transition renewed the two-render budget and
the requestAnimationFrame/geometry-measurement loop never terminated
(WebContent ~30% CPU for minutes after session recovery).
The MESSAGE_VIRTUAL_MEASUREMENT_MAX_RERENDERS budget now caps the whole
convergence burst globally; the cycle-key branch only records the new key.
The budget still resets at the correct lifecycle boundaries:
_markMessageVirtualMeasurementsSettled() and _clearMessageVirtualHeightCache().
Adds a deterministic node-based regression test driving the real ui.js
function with alternating keys ['A','B','A','B'] (before: 4 scheduled
re-renders; after: 2), plus a stable-key guard and a structural test.
* perf(chat): virtualize long message transcripts (#500)
* fix(chat): preserve virtual height cache on append (#500)
* fix(chat): bound virtual tail follow-up (#500)
* fix(chat): surface older history and bound virtual rerenders (#500)
* fix(chat): stabilize virtual history fallback (#500)
* fix(chat): preserve virtual compression anchors (#500)
* Keep virtualization regressions aligned with rebased sources (#500)
* fix(chat): preserve virtual heights across prepends (#500)
* test(update): isolate restart timing checks (#814)
* fix(chat): restore render contracts around virtual cache
* fix(chat): preserve legacy assistant anchor predicates
* fix(#3714): restore worklog-disclosure capture after HTML-cache early-return
Deep-review finding: the capture of _captureWorklogDetailDisclosureState was
moved before the HTML-cache fast-path return, failing the invariant test
test_render_rebuild_preserves_worklog_detail_disclosure_click_state (it must
not traverse the previous-session DOM when the cache path returns early).
Moved it back to just before inner.innerHTML='' (after the cache return).
Co-authored-by: Rod Boev <rod.boev@gmail.com>
* fix(#3714): restore Transparent Stream rehydration in HTML-cache fast path
Full-suite gate caught test_issue3820_chat_activity_display_mode failure: the
virtualization rewrite of the renderMessages HTML-cache fast-path block dropped
the _rehydrateTransparentStreamDom(inner) call (master has it; PR had 2 of 3
occurrences). On a cache-restore session switch, Transparent Stream controls
lost their property-assigned handlers. Restored the call in the same position
master has it (right after _sessionHtmlCacheSid=sid).
Co-authored-by: Rod Boev <rod.boev@gmail.com>
* fix(#3714): preserve live turn on scroll-rebuild even with zero streamed text
Opus ship-review residual (now fixed, not deferred): the live-turn re-attach
after a scroll-triggered virtualized rebuild was gated on _preservedLen>0, so a
turn showing only Activity/tool/worklog blocks with no streamed text yet (mid
tool-call) would not be preserved — scrolling up into history on a >80-row
transcript mid-stream could blink those live-only blocks for a frame. Broaden
the gate to also restore when the preserved turn has MORE structural blocks than
the rebuilt (lagging-S.messages) turn. Hoisted the _structuralCount helper above
the gate; whole-turn-vs-segment restore logic unchanged.
Co-authored-by: Rod Boev <rod.boev@gmail.com>
* chore(release): stamp v0.51.423 (Release OJ) for #500 transcript virtualization
---------
Co-authored-by: Rod Boev <rod.boev@gmail.com>
Co-authored-by: nesquena-hermes <agent@nesquena-hermes>
nesquena-hermes