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MatrixSynapse/changelog.d/9973.feature

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add a cache to have_seen_event (#9953) Empirically, this helped my server considerably when handling gaps in Matrix HQ. The problem was that we would repeatedly call have_seen_events for the same set of (50K or so) auth_events, each of which would take many minutes to complete, even though it's only an index scan.
2021-06-01 13:04:47 +02:00
Improve performance of incoming federation transactions in large rooms.