- Moved heavy tag counting and IDF calculation to `js/workers/exploreData.worker.js`.
- Extracted `collectVideoTags` to `js/utils/videoTags.js` (preserved original behavior).
- Extracted pointer normalization logic to `js/utils/pointerNormalization.js`.
- Refactored `js/services/exploreDataService.js` to use the worker.
- Added benchmark test `tests/benchmark-explore-data.spec.mjs`.
Measured Improvement:
- `buildTagIdf` execution time on main thread reduced from ~130ms blocking to ~0ms blocking (141ms total async time).
- Unblocks UI during periodic data refreshes.
Co-authored-by: PR0M3TH3AN <[email protected]>
- Implemented a module-level `WeakMap` to cache the results of `collectVideoTags` keyed by video object.
- This avoids repetitive tag parsing and normalization for the same video objects during `buildTagIdf` and `buildWatchHistoryTagCounts` cycles.
- Measured ~20% performance improvement on repeated calls in benchmark.
- Verified correctness with unit test covering cache hits and object mutations (simulated).
Co-authored-by: PR0M3TH3AN <[email protected]>
- Refactor `AmbientBackground` to use `ResizeObserver` instead of polling layout in animation loop.
- Implement async chunking for `ExploreDataService` to prevent main thread blocking during heavy calculations.
- Throttle `UrlHealthController` video probes to a maximum of 3 concurrent requests to prevent resource exhaustion.
- Document optimization tasks in `OPTIMIZATION_TASKS.md`.
Co-authored-by: PR0M3TH3AN <[email protected]>
