The prefetcher + alwaysRefresh combination was creating a feedback
loop visible in the logs as repeated `metadataPrefetcher: warming N
albums` cycles, each kicking N parallel getAlbum fetches that then
triggered drift writes that triggered re-emits that re-ran the
prefetcher. Tap-to-play was queueing behind 14+ in-flight cache
fetches.
Three structural fixes:
1. Prefetcher hard-dedupes per session via _warmedArtists Set.
Re-rendering a screen no longer re-fires fetches for ids we've
already seen.
2. Prefetcher only warms artistProvider, not albumProvider. Albums
carry track lists; pre-warming N albums fans out N parallel
"fetch tracks" round trips for content the user may never visit.
Artist rows are single-row lookups — cheap. Album detail loads
on tap (still fast: server-side perf work makes it ~one round
trip).
3. Drop alwaysRefresh from albumProvider, artistProvider,
artistAlbumsProvider, artistTracksProvider. Each was kicking one
silent background refresh per first cache hit. With the prefetcher
creating many subscriptions in parallel, that meant every
prewarmed id triggered an extra fetch even when drift was already
populated. playlistsListProvider keeps alwaysRefresh — system
playlists genuinely rotate UUIDs and need the catch-up. Pull-to-
refresh remains the explicit invalidation path everywhere else.
Removed the warmAlbums calls from the library Albums tab and artist
detail album grid (the storm sources).
Net effect: cold app boot warms ~12-15 artist rows once, period.
Tapping a tile still fetches its detail on demand (one round trip,
fast). User-initiated playback isn't queued behind cache work.
bvandeusen
4ede37d9ad