Emma Thorpe
61ce751ac5
Build and publish container / build (pull_request) Successful in 5m16s
Two faults in the split added last change, both visible in the first real run. It reported 700 pairs as attribution disagreements on the strength of the library holding the same title under a different artist. The examples show what that actually caught: "Everyday" matched Def Leppard, "Kaleidoscope" matched Chappell Roan, "Fight for Your Right" matched Motley Crue. Different songs that happen to share a name. Across fifty thousand tracks that is not an edge case, it is the common case, and presenting it as a matcher failure argues for exactly the title-only matching tier that would produce this rubbish on purpose. The signal for a real attribution miss is narrower: the library's own title credits the artist the play is filed under, as in "Voodoo People (Pendulum Remix)" against a scrobble credited to Pendulum. The normalised title has that suffix stripped -- which is what let the two meet in the first place -- so the raw title is searched for the name. Collisions are now counted and named separately, as what they are. The same query also took forty-seven seconds. lidarr_track was indexed on (norm_artist, norm_title), which a lookup by title alone cannot use because its leading column is the artist, so every unmatched key scanned all eighty-four thousand tracks. Add the index on the title by itself; the query plan changes from an automatic partial index to a covering one.