Four small modules the views below adopt:
- `lru-map.ts` — a Map re-inserted on read and trimmed from the front.
`explore-view` never unmounts and its two art caches were plain
Maps: twenty-four searches retained 20.58 MB and were still
accelerating, a cover thumbnail being ~27 kB of base64 and an artist
photo ~128 kB.
- `cache-stats.ts` — a bound has to stay checkable, so caches register
and `window.__yjCacheStats()` reports entries, retained chars and cap
in one eval, rather than the next session having to rebuild the
twenty-four-search reproduction first.
- `track-index.ts` — a WeakMap from the tracks array's identity to a
Map<FilePath, Track>. Five components turned selected file paths back
into tracks with `filePaths.map(fp => tracks.find(...))`, so "Select
all -> Edit tags" at 50 000 tracks blocked the main thread for 3.0 to
6.3 s. 68 ms after. Keying on the array's identity is safe for the
same reason the memoized filter caches are, and it is collected for
free when the store drops the array.
- `lazy-track-details.ts` — one memoised dynamic import, because
`track-details` (42 kB) was imported for side effect by all five
components that open it and so was evaluated before first paint
however the routes were split.
