diff --git a/.planning/STATE.md b/.planning/STATE.md index 61969e748..120a13498 100644 --- a/.planning/STATE.md +++ b/.planning/STATE.md @@ -10,11 +10,11 @@ See: .planning/PROJECT.md (updated 2026-03-03) ## Current Position Phase: 32 of 32 (State Update Optimization) -Plan: Not started -Status: Ready to plan -Last activity: 2026-03-05 — Completed Phase 31 Selector Optimization +Plan: 2 of 2 (Mixer Categorization Optimization) +Status: In progress +Last activity: 2026-03-05 — Completed 32-02-PLAN.md -Progress: [████████░░] 80% +Progress: [█████████░] 82% ## Performance Metrics @@ -26,8 +26,8 @@ Progress: [████████░░] 80% **v1.7 Performance Optimization (In Progress):** - Phases: 5 (phases 28-32) - Phases completed: 4 (Phases 28, 29, 30, 31) -- Requirements: 19 (13 complete) -- Plans completed: 5 +- Requirements: 19 (15 complete) +- Plans completed: 7 ## Accumulated Context @@ -54,6 +54,10 @@ Recent decisions (v1.7): - Default shallow comparison sufficient when props are stable from upstream - 30-01 - Group selectors by usage pattern (core, track, lookup, metadata) - 31-01 - shallowEqual with composed selectors for object return comparisons - 31-01 +- Single debounced track sync call prevents triple API calls on session join - 32-01 +- useCallback with stable dependency array for debounce instance prevents recreation - 32-01 +- Ref-based tracking for previous category values avoids circular updates - 32-02 +- ID-based array comparison faster than deep equality for mixer arrays - 32-02 ### Investigation Findings (v1.7) @@ -61,17 +65,19 @@ Recent decisions (v1.7): 1. VU meter updates at 50-70/sec through Redux - FIXED (Phase 28) 2. MixersContext creates new reference every render - FIXED (Phase 29) 3. 18+ individual selectors in useMixerHelper - FIXED (Phase 31) -4. Triple track sync calls on session join -5. Debounce instance recreation on dependency change +4. Triple track sync calls on session join - FIXED (Phase 32-01) +5. Debounce instance recreation on dependency change - FIXED (Phase 32-01) 6. Missing React.memo on child components - FIXED (Phase 30) +7. Redundant mixer categorization dispatches - FIXED (Phase 32-02) **Hotspot files:** - `useMixerStore.js:178-185` - VU update dispatch - FIXED - `useVuHelpers.js:99-104` - setVuStates object creation - FIXED - `mixersSlice.js:145-165` - updateMixer creates new objects -- `JKSessionScreen.js:463-475` - Triple track sync calls -- `useSessionModel.js:605-614` - Debounced trackChanges +- `JKSessionScreen.js:463-475` - Triple track sync calls - FIXED +- `useSessionModel.js:605-614` - Debounced trackChanges - FIXED - `MixersContext.js:10` - Unmemoized context value - FIXED +- `useMixerHelper.js:291-295` - Unconditional category dispatches - FIXED ### Deferred Issues @@ -97,8 +103,9 @@ Recent decisions (v1.7): ## Session Continuity Last session: 2026-03-05 -Stopped at: Completed 31-01-PLAN.md (Selector Optimization) +Stopped at: Completed 32-02-PLAN.md (Mixer Categorization Optimization) Resume file: None **Next steps:** -1. `/gsd:plan-phase 32` — plan final verification/performance testing phase +1. Continue Phase 32 execution or verify all performance optimizations complete +2. Plan verification/performance testing if needed diff --git a/.planning/phases/32-state-update-optimization/32-02-SUMMARY.md b/.planning/phases/32-state-update-optimization/32-02-SUMMARY.md new file mode 100644 index 000000000..f2ac3efc0 --- /dev/null +++ b/.planning/phases/32-state-update-optimization/32-02-SUMMARY.md @@ -0,0 +1,132 @@ +--- +phase: 32-state-update-optimization +plan: 02 +subsystem: state-management +tags: [redux, react, performance, selectors, memoization] + +# Dependency graph +requires: + - phase: 31-selector-optimization + provides: Composed selectors with shallowEqual comparisons +provides: + - Conditional dispatch with content comparison for mixer categorization + - mixerArraysEqual helper for ID-based array comparison + - prevCategoriesRef to track last dispatched category values +affects: [33-performance-testing, mixer-ui-components] + +# Tech tracking +tech-stack: + added: [] + patterns: + - "Content comparison before Redux dispatch" + - "useRef for tracking previous dispatch values" + - "ID-based array equality checking" + +key-files: + created: [] + modified: + - jam-ui/src/hooks/useMixerHelper.js + +key-decisions: + - "Use ref instead of selectors to track previous values (avoids circular updates)" + - "ID-based comparison via master.id + personal.id pairs (stable and fast)" + - "Console logs for debugging dispatch decisions (can be commented out in production)" + +patterns-established: + - "Conditional dispatch pattern: if (!arrayEqual(prev, next)) { dispatch(); prev = next; }" + - "Comparison by stable IDs rather than deep object comparison" + - "Ref-based tracking for values that shouldn't trigger re-renders" + +# Metrics +duration: 2min +completed: 2026-03-05 +--- + +# Phase 32 Plan 02: Mixer Categorization Optimization Summary + +**Conditional Redux dispatches eliminate redundant category updates - only dispatch when mixer IDs actually change** + +## Performance + +- **Duration:** 2 min +- **Started:** 2026-03-05T14:05:42Z +- **Completed:** 2026-03-05T14:07:07Z +- **Tasks:** 3 +- **Files modified:** 1 + +## Accomplishments +- Added mixerArraysEqual helper for efficient ID-based array comparison +- Implemented prevCategoriesRef to track last dispatched category values +- Replaced unconditional dispatches with conditional checks for all 5 categories +- Prevents unnecessary re-renders when mixer objects change but categories stay the same + +## Task Commits + +Each task was committed atomically: + +1. **Task 1: Add mixer array comparison helper** - `10a1eb657` (feat) + - Added mixerArraysEqual function with ID-based comparison + - Compares by master.id + personal.id pair keys + +2. **Task 2: Add prevCategoriesRef to track dispatched values** - `f7f6f10d6` (feat) + - Added useRef with category tracking object + - Avoids circular updates by using ref instead of selectors + +3. **Task 3: Add conditional dispatch to categorization** - `d53603cd0` (feat) + - Wrapped all 5 category dispatches in mixerArraysEqual checks + - Updates prevCategoriesRef after each dispatch + - Added console logs for debugging + +## Files Created/Modified +- `jam-ui/src/hooks/useMixerHelper.js` - Added content comparison before Redux dispatches + +## Decisions Made + +**1. Use ref instead of selectors for previous values** +- Selectors would cause circular updates (selector reads state that dispatch updates) +- Ref provides stable reference across renders without triggering re-renders +- Stores last dispatched values for next comparison + +**2. ID-based comparison instead of deep equality** +- Mixer objects have stable `id` fields +- Deep comparison with JSON.stringify would be slow and fragile +- Only care if the set of mixers changed, not individual properties +- Master/personal pair creates unique identifier per mixer pair + +**3. Console logs for debugging** +- Useful during development to verify dispatches being skipped +- Can be commented out in production +- Help confirm optimization is working as expected + +## Deviations from Plan + +None - plan executed exactly as written. + +## Issues Encountered + +**Pre-existing ESLint warnings** +- File has 60 pre-existing ESLint warnings (unused imports, missing dependencies) +- Not related to this change +- All formatting errors fixed with prettier +- New code follows existing patterns + +## Next Phase Readiness + +**Ready for performance testing (Phase 33):** +- Mixer categorization now only dispatches when content changes +- Expected reduction: 5 unnecessary dispatches per mixer update +- Can measure with Redux DevTools dispatch count before/after + +**Impact on downstream components:** +- Any components subscribed to category selectors will re-render less frequently +- VU meter updates won't trigger category re-categorization dispatches +- Should reduce overall render count significantly + +**Monitoring approach:** +- Console logs show when dispatches are skipped +- Redux DevTools can verify dispatch reduction +- React DevTools Profiler can measure render time improvements + +--- +*Phase: 32-state-update-optimization* +*Completed: 2026-03-05*