Don't query the rooms members table so much by using the new notifier api that allows you to specify room_ids to notify.

synapse/handlers/events.py

@@ -100,7 +100,7 @@ class EventStreamHandler(BaseHandler):
 
                 logger.debug("Scheduling _later: for %s", auth_user)
                 self._stop_timer_per_user[auth_user] = (
-                    self.clock.call_later(600, _later)
+                    self.clock.call_later(30, _later)
                 )
 
 

synapse/handlers/presence.py

@@ -260,23 +260,28 @@ class PresenceHandler(BaseHandler):
 
     @defer.inlineCallbacks
     def user_joined_room(self, user, room_id):
-        localusers = set()
-        remotedomains = set()
-
-        rm_handler = self.homeserver.get_handlers().room_member_handler
-        yield rm_handler.fetch_room_distributions_into(room_id,
-                localusers=localusers, remotedomains=remotedomains,
-                ignore_user=user)
+        statuscache = self._get_or_make_usercache(user)
 
         if user.is_mine:
-            yield self._send_presence_to_distribution(srcuser=user,
-                localusers=localusers, remotedomains=remotedomains,
-                statuscache=self._get_or_offline_usercache(user),
+            remote_domains = set(
+                (yield self.store.get_joined_hosts_for_room(room_id))
             )
 
-        for srcuser in localusers:
-            yield self._send_presence(srcuser=srcuser, destuser=user,
-                statuscache=self._get_or_offline_usercache(srcuser),
+            if not remote_domains:
+                defer.returnValue(None)
+
+            deferreds = []
+            for domain in remote_domains:
+                logger.debug(" | push to remote domain %s", domain)
+                deferreds.append(self._push_presence_remote(user, domain,
+                    state=statuscache.get_state())
+                )
+
+
+        self.push_update_to_clients_2(
+            observed_user=user,
+            room_ids=[room_id],
+            statuscache=self._get_or_offline_usercache(user),
         )
 
     @defer.inlineCallbacks
@@ -546,53 +551,28 @@ class PresenceHandler(BaseHandler):
         rm_handler = self.homeserver.get_handlers().room_member_handler
         room_ids = yield rm_handler.get_rooms_for_user(user)
 
+        remote_domains = set()
         for room_id in room_ids:
-            yield rm_handler.fetch_room_distributions_into(
-                room_id, localusers=localusers, remotedomains=remotedomains,
-                ignore_user=user,
+            remote_domains.update(
+                (yield self.store.get_joined_hosts_for_room(room_id))
             )
 
         if not localusers and not remotedomains:
             defer.returnValue(None)
 
-        yield self._send_presence_to_distribution(user,
-            localusers=localusers, remotedomains=remotedomains,
-            statuscache=statuscache
-        )
-
-    def _send_presence(self, srcuser, destuser, statuscache):
-        if destuser.is_mine:
-            self.push_update_to_clients(
-                observer_user=destuser,
-                observed_user=srcuser,
-                statuscache=statuscache)
-            return defer.succeed(None)
-        else:
-            return self._push_presence_remote(srcuser, destuser.domain,
-                state=statuscache.get_state()
-            )
-
-    @defer.inlineCallbacks
-    @trace_function
-    def _send_presence_to_distribution(self, srcuser, localusers=set(),
-            remotedomains=set(), statuscache=None):
-
-        for u in localusers:
-            logger.debug(" | push to local user %s", u)
-            self.push_update_to_clients(
-                observer_user=u,
-                observed_user=srcuser,
-                statuscache=statuscache,
-            )
-
         deferreds = []
         for domain in remotedomains:
             logger.debug(" | push to remote domain %s", domain)
-            deferreds.append(self._push_presence_remote(srcuser, domain,
+            deferreds.append(self._push_presence_remote(user, domain,
                 state=statuscache.get_state())
             )
 
-        yield defer.DeferredList(deferreds)
+        self.push_update_to_clients_2(
+            observed_user=user,
+            users_to_push=localusers,
+            room_ids=room_ids,
+            statuscache=statuscache,
+        )
 
     @defer.inlineCallbacks
     def _push_presence_remote(self, user, destination, state=None):
@@ -633,12 +613,7 @@ class PresenceHandler(BaseHandler):
             rm_handler = self.homeserver.get_handlers().room_member_handler
             room_ids = yield rm_handler.get_rooms_for_user(user)
 
-            for room_id in room_ids:
-                yield rm_handler.fetch_room_distributions_into(
-                    room_id, localusers=observers, ignore_user=user
-                )
-
-            if not observers:
+            if not observers and not room_ids:
                 break
 
             state = dict(push)
@@ -654,10 +629,10 @@ class PresenceHandler(BaseHandler):
             self._user_cachemap_latest_serial += 1
             statuscache.update(state, serial=self._user_cachemap_latest_serial)
 
-            for observer_user in observers:
-                self.push_update_to_clients(
-                    observer_user=observer_user,
+            self.push_update_to_clients_2(
                 observed_user=user,
+                users_to_push=observers,
+                room_ids=room_ids,
                 statuscache=statuscache,
             )
 
@@ -701,6 +676,15 @@ class PresenceHandler(BaseHandler):
             [observer_user],
         )
 
+    def push_update_to_clients_2(self, observed_user, users_to_push=[],
+                                 room_ids=[], statuscache=None):
+        statuscache.make_event(user=observed_user, clock=self.clock)
+
+        self.notifier.on_new_user_event(
+            users_to_push,
+            room_ids,
+        )
+
 
 class UserPresenceCache(object):
     """Store an observed user's state and status message.