Koito/db/queries
safierinx-a 8ce6ec494d Add bulk import optimization: track_lookup cache, batch inserts, BulkSubmitter
Adopts ListenBrainz-inspired patterns to speed up imports from ~24h to
under 30 minutes for 49k scrobbles.

Phase 1 - track_lookup cache table:
- New migration (000006) adds persistent entity lookup cache
- Maps normalized (artist, track, album) → (artist_id, album_id, track_id)
- SubmitListen fast path: cache hit skips 18 DB queries → 2 queries
- Cache populated after entity resolution, invalidated on merge/delete
- Benefits both live scrobbles and imports

Phase 2 - SaveListensBatch:
- New batch listen insert using pgx CopyFrom → temp table → INSERT ON CONFLICT
- Thousands of inserts per second vs one-at-a-time

Phase 3 - BulkSubmitter:
- Reusable import accelerator for all importers
- Pre-deduplicates scrobbles by (artist, track, album) in memory
- Worker pool (4 goroutines) for parallel entity creation on cache miss
- Batch listen insertion via SaveListensBatch

Phase 4 - Migrate importers:
- Maloja, Spotify, LastFM, ListenBrainz importers use BulkSubmitter
- Koito importer left as-is (already fast with pre-resolved IDs)

Phase 5 - Skip image lookups during import:
- GetArtistImage/GetAlbumImage calls fully skipped when SkipCacheImage=true
- Background tasks (FetchMissingArtistImages/FetchMissingAlbumImages) backfill

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-03-25 04:17:50 +05:30
..
alias.sql chore: initial public commit 2025-06-11 19:45:39 -04:00
artist.sql feat: refetch missing images on startup (#160) 2026-01-20 12:10:54 -05:00
etc.sql fix: release associations and add cleanup migration (#168) 2026-01-22 15:33:38 -05:00
interest.sql fix: correct interest bucket queries (#169) 2026-01-22 17:01:46 -05:00
listen.sql fix: respect client timezone for requests (#119) 2026-01-10 01:45:31 -05:00
release.sql fix: speedup top-artists and top-albums queries (#167) 2026-01-21 17:30:59 -05:00
search.sql feat: v0.0.8 2025-06-16 21:55:39 -04:00
sessions.sql chore: initial public commit 2025-06-11 19:45:39 -04:00
track.sql fix: speedup top-artists and top-albums queries (#167) 2026-01-21 17:30:59 -05:00
track_lookup.sql Add bulk import optimization: track_lookup cache, batch inserts, BulkSubmitter 2026-03-25 04:17:50 +05:30
users.sql chore: initial public commit 2025-06-11 19:45:39 -04:00
year.sql Pre-release version v0.0.13 (#52) 2025-07-26 15:57:46 -04:00