From 6b6aeb101763500cbeb8c61ae85facc779573afb Mon Sep 17 00:00:00 2001 From: Nuwan Date: Thu, 5 Mar 2026 15:18:31 +0530 Subject: [PATCH] docs(28-02): complete Wire Components to External Store plan 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 --- .planning/STATE.md | 18 +- .../28-vu-meter-optimization/28-02-SUMMARY.md | 164 ++++++++++++++++++ 2 files changed, 175 insertions(+), 7 deletions(-) create mode 100644 .planning/phases/28-vu-meter-optimization/28-02-SUMMARY.md diff --git a/.planning/STATE.md b/.planning/STATE.md index abd76012e..ff347fa15 100644 --- a/.planning/STATE.md +++ b/.planning/STATE.md @@ -10,11 +10,11 @@ See: .planning/PROJECT.md (updated 2026-03-03) ## Current Position Phase: 28 of 32 (VU Meter Optimization) -Plan: 01 of 03 (External VU Store Infrastructure) +Plan: 02 of 02 (Wire Components to External Store) Status: In progress -Last activity: 2026-03-03 — Completed 28-01-PLAN.md +Last activity: 2026-03-05 — Completed 28-02-PLAN.md -Progress: [█░░░░░░░░░] 10% +Progress: [██░░░░░░░░] 20% ## Performance Metrics @@ -26,7 +26,7 @@ Progress: [█░░░░░░░░░] 10% **v1.7 Performance Optimization (In Progress):** - Phases: 5 (phases 28-32) - Requirements: 19 -- Plans completed: 1 +- Plans completed: 2 ## Accumulated Context @@ -42,6 +42,10 @@ Recent decisions (v1.7): - Context splitting (separates high-frequency from low-frequency updates) - React.memo over PureComponent (functional components standard in codebase) - requestAnimationFrame batching (limits to 60fps, matches display refresh) +- Route VU data directly to vuStore in bridge callback, bypassing React state - 28-02 +- Per-component RAF loops over centralized subscription system (simpler for multiple mixer IDs) - 28-02 +- React.memo on SessionTrackVU to prevent parent re-render propagation - 28-02 +- className assignment over classList.add/remove for DOM efficiency - 28-02 ### Investigation Findings (v1.7) @@ -84,9 +88,9 @@ Recent decisions (v1.7): ## Session Continuity -Last session: 2026-03-03 -Stopped at: Completed 28-01-PLAN.md +Last session: 2026-03-05 +Stopped at: Completed 28-02-PLAN.md Resume file: None **Next steps:** -1. `/gsd:execute-plan 28-02` — Integrate VU store with native bridge and components +1. Continue with next phase in v1.7 Performance Optimization milestone diff --git a/.planning/phases/28-vu-meter-optimization/28-02-SUMMARY.md b/.planning/phases/28-vu-meter-optimization/28-02-SUMMARY.md new file mode 100644 index 000000000..206719850 --- /dev/null +++ b/.planning/phases/28-vu-meter-optimization/28-02-SUMMARY.md @@ -0,0 +1,164 @@ +--- +phase: 28-vu-meter-optimization +plan: 02 +subsystem: ui +tags: [react, performance, vu-meters, requestAnimationFrame, direct-dom] + +# Dependency graph +requires: + - phase: 28-01 + provides: "External vuStore with RAF batching and useSyncExternalStore shim" +provides: + - "VU data routing from native bridge to external store" + - "Direct DOM manipulation for VU meter visuals via refs" + - "Zero React re-renders from 50-70 VU updates/second" +affects: [future-performance-work, high-frequency-updates] + +# Tech tracking +tech-stack: + added: [] + patterns: + - "Direct DOM manipulation via refs for high-frequency visuals" + - "Per-component RAF loops for UI polling pattern" + - "External store integration without Redux/Context" + +key-files: + created: [] + modified: + - jam-ui/src/hooks/useMixerStore.js + - jam-ui/src/hooks/useVuHelpers.js + - jam-ui/src/context/VuContext.js + - jam-ui/src/components/client/SessionTrackVU.js + - jam-ui/src/stores/vuStore.js + +key-decisions: + - "Route VU data directly to vuStore in bridge callback, bypassing React state" + - "Per-component RAF loops over centralized subscription system (simpler for multiple mixer IDs)" + - "React.memo on SessionTrackVU to prevent parent re-render propagation" + - "className assignment over classList.add/remove for DOM efficiency" + - "Remove VU state management from useVuHelpers, keep legacy functions for backward compatibility" + +patterns-established: + - "Direct DOM updates via refs: Store element refs, use RAF loop to poll external store, manipulate DOM directly without triggering React reconciliation" + - "External store integration: Import store directly in components, bypass Context/Redux for high-frequency data" + - "Bridge callback optimization: Route native events to external store instead of Redux dispatch" + +# Metrics +duration: ~45min (across multiple sessions, including checkpoint verification) +completed: 2026-03-05 +--- + +# Phase 28 Plan 02: Wire Components to External Store Summary + +**VU meters now animate via direct DOM updates at 60fps with zero React re-renders from 50-70 updates/sec native bridge data flow** + +## Performance + +- **Duration:** ~45 minutes (across multiple sessions with checkpoint pause) +- **Started:** 2026-03-05T08:00:00Z (approximate) +- **Completed:** 2026-03-05T09:46:57Z +- **Tasks:** 4 (3 auto + 1 human-verify checkpoint) +- **Files modified:** 5 + +## Accomplishments + +- **Native bridge integration:** useMixerStore now routes VU data directly to vuStore.updateLevel, bypassing Redux entirely +- **Direct DOM rendering:** SessionTrackVU rewritten with RAF loop and ref-based DOM manipulation - no React re-renders for VU visuals +- **Simplified state management:** useVuHelpers and VuContext no longer manage VU state, only provide store reference +- **Zero render overhead:** React DevTools confirms no re-renders from VU updates after verification approval + +## Task Commits + +Each task was committed atomically: + +1. **Task 1: Update useMixerStore to route VU data to external store** - `96d8f97` (refactor) +2. **Task 2: Simplify useVuHelpers and VuContext** - `f821485` (refactor) +3. **Task 3: Rewrite SessionTrackVU with direct DOM updates** - `a020e27` (refactor) +4. **Task 4: Human verification** - APPROVED (VU meters animating correctly after fix) + +**Additional fix during verification:** +- **Fix: getLevelSnapshot check pendingUpdates** - `a1d24fe38` (fix) + +**Plan metadata:** (to be committed after this summary) + +## Files Created/Modified + +- `jam-ui/src/hooks/useMixerStore.js` - Routes VU data from native bridge to vuStore.updateLevel +- `jam-ui/src/hooks/useVuHelpers.js` - Removed useState, exposes vuStore methods, kept legacy functions +- `jam-ui/src/context/VuContext.js` - Simplified to provide vuStore reference only +- `jam-ui/src/components/client/SessionTrackVU.js` - Complete rewrite with RAF loop and direct DOM manipulation via refs +- `jam-ui/src/stores/vuStore.js` - Fixed getLevelSnapshot to check pendingUpdates for immediate access + +## Decisions Made + +**1. Route VU data in bridge callback** +- **Decision:** Call vuStore.updateLevel directly in useMixerStore handleBridgeCallback +- **Rationale:** Intercepts VU data at source, prevents Redux dispatch entirely +- **Impact:** 50-70 updates/sec now go to external buffer instead of triggering React state updates + +**2. Per-component RAF loops over subscription** +- **Decision:** Each SessionTrackVU runs own RAF loop polling vuStore.getLevelSnapshot +- **Rationale:** Simpler than subscription system for multiple mixer IDs, RAF auto-pauses when tab backgrounded +- **Impact:** Each VU meter polls at ~60fps (display refresh rate), matches browser capabilities + +**3. Direct DOM manipulation pattern** +- **Decision:** Store light element refs, update className directly via RAF loop +- **Rationale:** Bypasses React reconciliation entirely, proven pattern for high-frequency visuals +- **Impact:** Zero React involvement in VU animation - confirmed via DevTools + +**4. React.memo on SessionTrackVU** +- **Decision:** Wrap component with memo to prevent parent re-render propagation +- **Rationale:** Even though VU updates don't trigger re-renders, parent changes (mixer config) shouldn't force re-render +- **Impact:** Component only re-renders when mixers prop reference changes + +**5. Keep legacy functions in useVuHelpers** +- **Decision:** Preserve createQualifiedId, renderVU, updateVU for backward compatibility +- **Rationale:** Other components may still use these functions, minimize scope of changes +- **Impact:** Clean migration path, no breaking changes to consumers + +## Deviations from Plan + +### Auto-fixed Issues + +**1. [Rule 1 - Bug] getLevelSnapshot not checking pendingUpdates** +- **Found during:** Task 4 (Human verification) +- **Issue:** VU meters not animating - getLevelSnapshot returned null for newly updated levels because it only checked flushedLevels, but RAF loop was calling it before next flush cycle +- **Fix:** Modified getLevelSnapshot to check pendingUpdates first, then fall back to flushedLevels - provides immediate access to most recent data +- **Files modified:** jam-ui/src/stores/vuStore.js +- **Verification:** VU meters started animating immediately after fix +- **Committed in:** a1d24fe38 (fix commit after verification checkpoint) + +--- + +**Total deviations:** 1 auto-fixed (1 bug) +**Impact on plan:** Critical fix for correctness - getLevelSnapshot must provide immediate access to buffered updates or RAF loop sees stale data. No scope creep, just fixing incomplete implementation from Plan 01. + +## Issues Encountered + +**VU meters not animating after initial implementation** +- **Problem:** SessionTrackVU RAF loop called getLevelSnapshot but got null/undefined, no visual updates +- **Root cause:** getLevelSnapshot only checked flushedLevels (updated every 16ms), but RAF loop (60fps = ~16ms) was reading between flush cycles +- **Solution:** Updated getLevelSnapshot to check pendingUpdates buffer first - provides immediate access without waiting for next flush +- **Outcome:** VU meters animated correctly after fix, approved by user verification + +## User Setup Required + +None - no external service configuration required. + +## Next Phase Readiness + +**What's ready:** +- VU meter optimization complete (requirements VU-01, VU-02, VU-03 satisfied) +- External store pattern established for other high-frequency updates +- Direct DOM manipulation pattern proven for React 16 performance optimization + +**Next steps:** +- Continue with remaining plans in Phase 28 (if any) +- Monitor VU meter performance in production for extended sessions +- Consider applying external store pattern to other high-frequency updates (e.g., audio waveforms, real-time meters) + +**No blockers or concerns.** + +--- +*Phase: 28-vu-meter-optimization* +*Completed: 2026-03-05*