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Use fetched events for lazy loading efficiency

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This commit is contained in:
Erik Johnston 2024-05-03 10:59:24 +01:00
parent 944d7f6727
commit cdfed1c4fa
1 changed files with 17 additions and 2 deletions
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19
synapse/handlers/sync.py
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@ -1286,8 +1286,12 @@ class SyncHandler:
#
# c.f. #16941 for an example of why we can't do this for all non-gappy
# syncs.
#
# We can apply a similar optimization for gappy syncs if we know the room
# has been linear in the gap, so instead of just looking at the
# `timeline.batch` we can look at `timeline.fetched_events`.
is_linear_timeline = True
if batch.events:
if batch.fetched_events:
# We need to make sure the first event in our batch points to the
# last event in the previous batch.
last_event_id_prev_batch = (
@ -1304,8 +1308,19 @@ class SyncHandler:
break
prev_event_id = e.event_id
if is_linear_timeline and not batch.limited:
if is_linear_timeline and not batch.fetched_limited:
state_ids: StateMap[str] = {}
# If the returned batch is actually limited, we need to add the
# state events that happened in the batch.
if batch.limited:
timeline_events = {e.event_id for e in batch.events}
state_ids = {
(e.type, e.state_key): e.event_id
for e in batch.fetched_events
if e.is_state() and e.event_id not in timeline_events
}
if lazy_load_members:
if members_to_fetch and batch.events:
# We're lazy-loading, so the client might need some more