Phase 30: Component Memoization
- React.memo API and patterns for React 16.13.1
- Prop stability requirements documented
- Integration with Phase 29 context memoization
- Common pitfalls: inline props, children, context
- Verification with React DevTools Profiler
- DisplayName for debugging best practices
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Phase 29 verified and complete:
- MixersContext.Provider value memoized with useMemo
- VuContext separated from MixerConfigContext (Phase 28)
- 6 context consumers wrapped with React.memo
- useMixerHelper.getMixer stabilized with useCallback
Requirements satisfied: CTX-01, CTX-02, CTX-03
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Tasks completed: 4/4
- Task 1a: Stabilize useMixerHelper function references
- Task 1b: Memoize MixersContext provider value
- Task 2: Memoize VuContext and GlobalContext provider values
- Task 3: Wrap context consumers with React.memo
SUMMARY: .planning/phases/29-context-optimization/29-01-SUMMARY.md
Accomplishments:
- Memoized all 3 context providers (MixersContext, VuContext, GlobalContext)
- Stabilized getMixer and dependent function references
- Wrapped 6 consumer components with React.memo
- Eliminated cascading re-renders from context value changes
Requirements completed:
- CTX-00: useMixerHelper.getMixer wrapped with useCallback
- CTX-01: MixersContext.Provider value is memoized
- CTX-03: Context consumers only re-render when data changes
Performance impact:
- Volume slider changes no longer re-render VU meters
- VU updates no longer re-render volume sliders
- Context consumers only re-render when their specific data changes
Phase 28 verified and approved:
- VU data flows through external store (vuStore.js)
- VU components use refs for direct DOM updates
- React DevTools shows 0 re-renders from VU updates
- Session screen remains responsive
Requirements satisfied: VU-01, VU-02, VU-03
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Tasks completed: 4/4
- Update useMixerStore to route VU data to external store
- Simplify useVuHelpers and VuContext
- Rewrite SessionTrackVU with direct DOM updates
- Human verification (approved)
Additional fix:
- getLevelSnapshot now checks pendingUpdates for immediate access
SUMMARY: .planning/phases/28-vu-meter-optimization/28-02-SUMMARY.md
Tasks completed: 2/2
- Install useSyncExternalStore shim and create external VU store
- Create useVuStore React hooks
SUMMARY: .planning/phases/28-vu-meter-optimization/28-01-SUMMARY.md
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Phase 28: VU Meter Optimization
- 2 plan(s) in 2 wave(s)
- 1 parallel (wave 1), 1 sequential (wave 2)
- Ready for execution
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Phase 28: VU Meter Optimization
- Standard stack identified (use-sync-external-store shim, requestAnimationFrame)
- Architecture patterns documented (external store, direct DOM updates with refs)
- Pitfalls catalogued (getSnapshot object creation, rAF cleanup, layout thrashing)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Goals:
- Eliminate page freezes from excessive React re-renders
- Optimize VU meter updates (50-70/sec → batched RAF)
- Prevent cascading re-renders with memoization
- Apply React best practices for granular updates
Phases:
28. VU Meter Optimization
29. Context Optimization
30. Component Memoization
31. Selector Optimization
32. State Update Optimization
19 requirements across 5 phases.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Removed Phase 28 (Metronome Responsiveness) from v1.6 milestone.
Metronome responsiveness is satisfactory after Phase 26-27 improvements.
MET-01, MET-02 requirements moved to Out of Scope.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Tasks completed: 2/2
- Use openBackingTrack action in handleBackingTrackSelected
- Add ignore flag to duration fetch useEffect
SUMMARY: .planning/phases/27-backing-track-sync/27-01-SUMMARY.md
Phase 26: JamTrack Polish
- Plan 26-03 removes 'idle' from valid render states
- Closes UAT gap: stems/controls appearing before sync
- 1 plan in wave 3, depends on 26-02
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- 3 phases: JamTrack Polish, Backing Track Sync, Metronome Responsiveness
- 8 requirements mapped to phases
- Research complete for all features
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- 5 comprehensive test sections covering all memory leak scenarios
- Timer cleanup verification test
- Callback accumulation verification test
- Async operation cleanup verification test
- 15-minute modal idle stability test
- 15-minute active recording stability test
- Troubleshooting guide for each failure type
Phase 24: Fix Recording Crash
- 1 plan in 1 wave
- 1 parallel, 0 sequential
- Ready for execution
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- User verified 15+ minute session stability
- No freezes or performance bottlenecks observed
- All memory leak fixes from Phases 20-22 confirmed working
Nuwan