Tranche-1 performance sign-off (2.49)

Product version: 2.49 — closes the 2.00…2.49 performance arc for tranche 1. Animations stay. Not a GPU chart rewrite.

Related: performance.md · friction-log.md (FL-008) · developer-diagnostics.md (2.44) · checkpoint-250 (2.50 shipped)

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Verdict (2.49)

Question	Answer
2.x perf arc signed off?	Yes — waves 5 → 8 documented + Gallery callouts
Animations removed?	No — trim waste, not motion (1.90 rule)
FL-008 closed?	Partial — collection + shell paths hardened; 2.64 if field metrics reopen
Retail FPS policy?	Yes — applyRetailProfile() (2.44)
Next perf slice?	2.64 (friction-only) or skip if queue empty

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2.x wave map

Wave	Slice	Focus
5	2.18	DataTable / ItemsView debounce + skip unchanged
6	2.28	NavigationView cache + skip counters + smoke timings
7	2.40	ListDetailsView / TreeDataGrid / FileTree filter paths
8	2.49	Charts/dashboard budgets + ItemsWrapGrid + tranche sign-off (wave 8)

Full checklists: performance.md.

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Wave 8 checklist (2.49)

#	Surface	Check
1	Stable six charts	≤ ~500 points/series; revealAnimationPointBudget skips heavy reveal
2	Dashboard	KpiTile.trendValues ring capped (~16); one chart per ChartCard
3	ItemsWrapGrid	filterDebounceMs (120); low hundreds of tiles — not virtualization
4	Experimental grids	CalendarView / NotificationCenter — bounded models, no 10k cells
5	Shell	Pair wave 6 cache limits with wave 7 filter debounce
6	Diagnostics	Dev-only FrameStats — retail profile in shipping builds
7	Smoke	--smoke --startup-log — relative compare only, not CI ms gate

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Consumer checklist

• [ ] Skim upgrade-notes.md 2.48 → 2.49
• [ ] Product dashboards: dashboard-compose-decision.md + chart point budgets
• [ ] Large collections: C++ model or paging — not JS filter on thousands+
• [ ] Optional: python scripts/smoke_gallery.py --build-dir build (Release)

Out: Built-in profiler · chart GPU rewrite · lite Gallery binary.