From bc487cd71573795fc37f369d5f4350039c7fbe3d Mon Sep 17 00:00:00 2001 From: Caleb Allen Date: Wed, 4 Mar 2026 23:24:15 -0500 Subject: [PATCH] docs(08-03): complete renderTrackRow optimization plan - SUMMARY.md with classMap directive migration results - STATE.md updated: 3/4 plans complete, decisions recorded - ROADMAP.md updated with plan progress --- .planning/STATE.md | 31 +++--- .../08-03-SUMMARY.md | 95 +++++++++++++++++++ 2 files changed, 112 insertions(+), 14 deletions(-) create mode 100644 .planning/phases/08-frontend-performance-ux/08-03-SUMMARY.md diff --git a/.planning/STATE.md b/.planning/STATE.md index c002c4c..1691306 100644 --- a/.planning/STATE.md +++ b/.planning/STATE.md @@ -3,12 +3,12 @@ gsd_state_version: 1.0 milestone: v1.0 milestone_name: milestone status: in-progress -last_updated: "2026-03-05T04:17:06Z" +last_updated: "2026-03-05T04:22:19Z" progress: total_phases: 8 completed_phases: 7 total_plans: 17 - completed_plans: 15 + completed_plans: 16 --- # YellowJacket — Consolidation Milestone State @@ -16,17 +16,17 @@ progress: ## Project Reference **Core value:** The music player works reliably and feels solid — every interaction is correct, responsive, and trustworthy. -**Current focus:** Phase 8 in progress — Plans 01-02 complete. Virtualizer repeat() migration done. Continuing with frontend polish. +**Current focus:** Phase 8 in progress — Plans 01-03 complete. renderTrackRow/renderTrackItem optimized with classMap. One plan remaining. **Milestone:** Consolidation (correctness, performance, code quality, UX polish, test coverage) ## Current Position **Phase:** 08-frontend-performance-ux -**Plan:** 2/4 (Plans 01-02 complete) +**Plan:** 3/4 (Plans 01-03 complete) **Status:** In progress ``` -Phase Progress: [########] 8/8 phases — Phase 8: 2/4 plans complete +Phase Progress: [########] 8/8 phases — Phase 8: 3/4 plans complete ``` ## Performance Metrics @@ -34,7 +34,7 @@ Phase Progress: [########] 8/8 phases — Phase 8: 2/4 plans complete | Metric | Value | |--------|-------| | Phases complete | 7/8 | -| Plans complete | 2/4 (Phase 8) | +| Plans complete | 3/4 (Phase 8) | | Requirements delivered | 22/26 | | Tests added | 84 | | Bugs fixed | 9 | @@ -55,6 +55,7 @@ Phase Progress: [########] 8/8 phases — Phase 8: 2/4 plans complete | Phase 07 P02 | 1 min | 1 tasks | 1 files | | Phase 08 P01 | 1 min | 2 tasks | 3 files | | Phase 08 P02 | 3 min | 2 tasks | 5 files | +| Phase 08 P03 | 2 min | 2 tasks | 2 files | ## Accumulated Context @@ -90,6 +91,8 @@ Phase Progress: [########] 8/8 phases — Phase 8: 2/4 plans complete | 150ms search debounce with instant clear | Balances responsiveness with computation cost; empty clears are immediate for snappy UX | Phase 8 | | :host scoped design tokens | Component-level token scope matches Lit's shadow DOM encapsulation model | Phase 8 | | Inline repeat() keys over gridKeyFunction | Dead method removal; key logic is cleaner inline in repeat() calls | Phase 8 | +| classMap over array filter/join | Eliminates per-row array allocation; classMap diffs internally for efficient DOM updates | Phase 8 | +| Hoist search term outside cols.map | Avoids redundant property access per column per row in render hot path | Phase 8 | ### TODOs @@ -133,18 +136,18 @@ None currently. ### Last Session **Date:** 2026-03-05 -**What happened:** Executed Phase 8 Plan 02 — virtualizer repeat() directive migration -**Where we stopped:** Completed 08-02-PLAN.md (2 tasks, all verification passed). Phase 8: 2/4 plans complete. -**Next action:** Execute Phase 8 Plan 03 +**What happened:** Executed Phase 8 Plan 03 — renderTrackRow/renderTrackItem optimization with classMap +**Where we stopped:** Completed 08-03-PLAN.md (2 tasks, all verification passed). Phase 8: 3/4 plans complete. +**Next action:** Execute Phase 8 Plan 04 ### Context for Next Session -- Phase 8 Plans 01-02 complete -- All 7 lit-virtualizer instances now use repeat() with stable entity keys -- DOM recycling enabled for scrolling/filtering in large libraries -- 2 plans remaining in Phase 8 +- Phase 8 Plans 01-03 complete +- classMap directive used in all render hot paths (track-list + queue-panel) +- Search highlight short-circuits when term is empty +- 1 plan remaining in Phase 8 --- *State initialized: 2026-02-27* -Last activity: 2026-03-05 - Completed 08-02: virtualizer repeat() directive migration +Last activity: 2026-03-05 - Completed 08-03: renderTrackRow classMap optimization *Last updated: 2026-03-05* diff --git a/.planning/phases/08-frontend-performance-ux/08-03-SUMMARY.md b/.planning/phases/08-frontend-performance-ux/08-03-SUMMARY.md new file mode 100644 index 0000000..6c01661 --- /dev/null +++ b/.planning/phases/08-frontend-performance-ux/08-03-SUMMARY.md @@ -0,0 +1,95 @@ +--- +phase: 08-frontend-performance-ux +plan: 03 +subsystem: frontend +tags: [lit, classMap, performance, render-optimization, directives] + +# Dependency graph +requires: + - phase: 08-frontend-performance-ux + provides: "repeat() directive migration on all virtualizer instances" +provides: + - "classMap directive for conditional CSS classes in track-list renderTrackRow and queue-panel renderTrackItem" + - "Search highlight short-circuit when search term is empty" + - "Hoisted search term lookup outside per-column iteration loop" +affects: [08-frontend-performance-ux] + +# Tech tracking +tech-stack: + added: [] + patterns: ["classMap directive for conditional CSS classes in render hot paths"] + +key-files: + created: [] + modified: + - frontend/src/components/track-list/track-list.ts + - frontend/src/components/queue-panel/queue-panel.ts + +key-decisions: + - "classMap object literal per-call is acceptable — classMap internally diffs and only updates changed classes" + - "Hoisted searchCtrl.term outside cols.map to avoid repeated property access per column" + +patterns-established: + - "Render hot path pattern: use classMap directive instead of array filter/join for conditional CSS classes" + +requirements-completed: [PERF-05, UX-02] + +# Metrics +duration: 2min +completed: 2026-03-05 +--- + +# Phase 8 Plan 03: renderTrackRow Optimization Summary + +**Replaced array filter/join class construction with classMap directive in track-list and queue-panel render hot paths, eliminating per-row array allocations during scrolling** + +## Performance + +- **Duration:** 2 min +- **Started:** 2026-03-05T04:19:55Z +- **Completed:** 2026-03-05T04:22:19Z +- **Tasks:** 2 +- **Files modified:** 2 + +## Accomplishments +- All conditional CSS class construction in renderTrackRow (track-row, fav-icon, cell) converted from array filter/join to classMap directive +- Queue-panel renderTrackItem class construction (track-item, active, selected, drop-before, drop-after) converted to classMap +- Search term property lookup hoisted outside per-column loop to avoid repeated access +- Search highlighting already short-circuits when term is empty — no additional optimization needed + +## Task Commits + +Each task was committed atomically: + +1. **Task 1: Replace class string construction with classMap directive in renderTrackRow** - `ad21027` (perf) +2. **Task 2: Optimize column value computation and apply classMap to queue-panel renderTrackItem** - `62f41c2` (perf) + +## Files Created/Modified +- `frontend/src/components/track-list/track-list.ts` - classMap for track-row, fav-icon, and cell classes; hoisted search term lookup +- `frontend/src/components/queue-panel/queue-panel.ts` - classMap for track-item with active, selected, drop-before, drop-after states + +## Decisions Made +- classMap object literal allocation per-call is acceptable since classMap internally diffs previous values and only applies DOM changes for actually changed classes — net benefit over string concatenation in Lit's update cycle +- Hoisted searchCtrl.term outside the cols.map loop — avoids redundant property access per column per row + +## Deviations from Plan + +None - plan executed exactly as written. + +## Issues Encountered +None + +## User Setup Required +None - no external service configuration required. + +## Next Phase Readiness +- All render hot path optimizations complete for track-list and queue-panel +- Ready for Plan 04 (final phase 8 plan) + +## Self-Check: PASSED + +All key files exist on disk. All task commits verified in git history. + +--- +*Phase: 08-frontend-performance-ux* +*Completed: 2026-03-05*