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Short circuit if all new events have same state group

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This commit is contained in:
Erik Johnston 2017-03-27 18:00:47 +01:00
parent 281553afe6
commit d82c42837f
1 changed files with 49 additions and 34 deletions
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19
synapse/storage/events.py
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@ -428,6 +428,7 @@ class EventsStore(SQLBaseStore):
# Now we need to work out the different state sets for
# each state extremities
state_sets = []
state_groups = set()
missing_event_ids = []
was_updated = False
for event_id in new_latest_event_ids:
@ -437,9 +438,17 @@ class EventsStore(SQLBaseStore):
if event_id == ev.event_id:
if ctx.current_state_ids is None:
raise Exception("Unknown current state")
# If we've akready seen the state group don't bother adding
# it to the state sets again
if ctx.state_group not in state_groups:
state_sets.append(ctx.current_state_ids)
if ctx.delta_ids or hasattr(ev, "state_key"):
was_updated = True
if ctx.state_group:
# Add this as a seen state group (if it has a state
# group)
state_groups.add(ctx.state_group)
break
else:
# If we couldn't find it, then we'll need to pull
@ -453,14 +462,20 @@ class EventsStore(SQLBaseStore):
missing_event_ids,
)
groups = set(event_to_groups.itervalues())
group_to_state = yield self._get_state_for_groups(groups)
groups = set(event_to_groups.itervalues()) - state_groups
if groups:
group_to_state = yield self._get_state_for_groups(groups)
state_sets.extend(group_to_state.itervalues())
if not new_latest_event_ids:
current_state = {}
elif was_updated:
if len(state_sets) == 1:
# If there is only one state set, then we know what the current
# state is.
current_state = state_sets[0]
else:
# We work out the current state by passing the state sets to the
# state resolution algorithm. It may ask for some events, including
# the events we have yet to persist, so we need a slightly more