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* add a cache to have_seen_event (#9953)Richard van der Hoff2021-06-011-1/+0
| | | 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.
* Combine `LruCache.invalidate` and `invalidate_many` (#9973)Richard van der Hoff2021-05-271-0/+1
* Make `invalidate` and `invalidate_many` do the same thing ... so that we can do either over the invalidation replication stream, and also because they always confused me a bit. * Kill off `invalidate_many` * changelog