4aiman
44dfa0b88a
ATTACH UPDATE with correlated subqueries on name_lower was doing full table scans on 13000 rows. 56 seconds on desktop, 2-5 min on phone. User saw "загрузка..." for minutes on every launch. Fix: CREATE INDEX on name_lower in both main and seed DBs before the UPDATE. Also pre-built index in seed DB file. Benchmarked: 56.5s -> 0.09s on desktop. Phone should be <1s. |
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