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The account-deletion reconcile in account.ts uses a correlated subquery to pick the latest-per-event row from memory_completions. Without an index whose leading column is event_id the inner subquery falls back to scanning sqlite_autoindex_memory_completions_1, making the reconcile O(rows^2) — observed cost in production was ~171k rows read for one deletion against ~407 rows. With this covering index the inner becomes a seek and the reconcile drops to ~rows*log(rows). |
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| .. | ||
| 0001_initial.sql | ||
| 0002_drop_char_columns.sql | ||
| 0003_object_id_to_anim_index.sql | ||
| 0004_add_language.sql | ||
| 0005_crash_reports.sql | ||
| 0006_cloud_storage.sql | ||
| 0007_memory_events.sql | ||
| 0008_memory_completions_event_index.sql | ||