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authorErik Johnston <erik@matrix.org>2020-05-05 17:07:59 +0100
committerErik Johnston <erik@matrix.org>2020-05-05 17:40:29 +0100
commitf9073893af82eec64b594dbcaef37c407a291c52 (patch)
tree6b57fce16886aef99c6e796900822290866a38df /synapse/util/hash.py
parentWorkaround for assertion errors from db_query_to_update_function (#7378) (diff)
downloadsynapse-f9073893af82eec64b594dbcaef37c407a291c52.tar.xz
Speed up fetching device lists changes in sync.
Currently we copy `users_who_share_room` needlessly about three times,
which is expensive when the set is large (which it can easily be).
Diffstat (limited to 'synapse/util/hash.py')
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