synapse/changelog.d/16805.misc
Erik Johnston c43f751013
Optimize query for fetching to-device messages in /sync (#16805)
The current query supports passing in a list of users, which generates a
query using `user_id = ANY(..)`. This is generates a less efficient
query plan that is notably slower than a simple `user_id = ?` condition.

Note: The new function is mostly a copy and paste and then a
simplification of the existing function.
2024-01-11 13:37:57 +00:00

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Optimize query for fetching to-device messages in `/sync`.