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Minor perf speed up for large accounts on SSS (#17751)

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This works as instead of passing *all* rooms to `record_sent_rooms` we
only need to pass rooms that were previously not in the LIVE state.

This came from a py-spy where we were spending ~10% CPU calling these
functions. Note that `record_sent_rooms` is a no-op for rooms that are
already in the `LIVE` state, so we only need to call them for
`PREVIOUSLY` or `INITIAL` rooms.
This commit is contained in:
Erik Johnston 2024-09-30 12:58:02 +01:00 committed by GitHub
parent ef9ef99f59
commit ece66ba61c
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2 changed files with 7 additions and 4 deletions
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changelog.d/17751.misc Normal file
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@ -0,0 +1 @@
Minor performance increase for large accounts using sliding sync.

10
synapse/handlers/sliding_sync/extensions.py
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@ -572,7 +572,8 @@ class SlidingSyncExtensionHandler:
# Now record which rooms are now up to data, and which rooms have
# pending updates to send.
new_connection_state.account_data.record_sent_rooms(relevant_room_ids)
new_connection_state.account_data.record_sent_rooms(previously_rooms.keys())
new_connection_state.account_data.record_sent_rooms(initial_rooms)
missing_updates = (
all_updates_since_the_from_token.keys() - relevant_room_ids
)
@ -763,9 +764,10 @@ class SlidingSyncExtensionHandler:
room_id_to_receipt_map[room_id] = {"type": type, "content": content}
# Now we update the per-connection state to track which receipts we have
# and haven't sent down.
new_connection_state.receipts.record_sent_rooms(relevant_room_ids)
# Update the per-connection state to track which rooms we have sent
# all the receipts for.
new_connection_state.receipts.record_sent_rooms(previously_rooms.keys())
new_connection_state.receipts.record_sent_rooms(initial_rooms)
if from_token:
# Now find the set of rooms that may have receipts that we're not sending