Koito/internal
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
..
catalog Add bulk import optimization: track_lookup cache, batch inserts, BulkSubmitter 2026-03-25 04:17:50 +05:30
cfg feat: add api key auth to web api (#183) 2026-01-26 13:48:43 -05:00
db Add bulk import optimization: track_lookup cache, batch inserts, BulkSubmitter 2026-03-25 04:17:50 +05:30
export feat: v0.0.10 (#23) 2025-06-18 08:48:19 -04:00
images feat: lastfm image support (#166) 2026-01-21 16:03:05 -05:00
importer Add bulk import optimization: track_lookup cache, batch inserts, BulkSubmitter 2026-03-25 04:17:50 +05:30
logger chore: initial public commit 2025-06-11 19:45:39 -04:00
mbz Add MusicBrainz search-by-name enrichment for scrobbles without IDs 2026-03-25 00:01:24 +05:30
memkv Pre-release version v0.0.14 (#96) 2025-11-19 20:26:56 -05:00
models feat: all time rank display (#149) 2026-01-16 01:03:23 -05:00
repository Add bulk import optimization: track_lookup cache, batch inserts, BulkSubmitter 2026-03-25 04:17:50 +05:30
summary fix: use sql rank (#148) 2026-01-15 21:08:30 -05:00
utils fix: respect client timezone for requests (#119) 2026-01-10 01:45:31 -05:00