Tuning db perf #4
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- Add queryAccountTimestamp(accountId) to fetch only the timestamp - Update Collector to enqueue account updates only when newer than existing timestamp, avoiding redundant writes - Tune SQLite PRAGMAs: synchronous=NORMAL, temp_store=MEMORY, cache_size≈64MB, wal_autocheckpoint=1000 (retain WAL mode)
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Optimize account update path and tune SQLite for better performance