Don't recreate so many sets

1 files changed, 1 insertions, 2 deletions

diff --git a/synapse/app/synchrotron.py b/synapse/app/synchrotron.py

index 29f075aa5f..449fac771b 100644
--- a/synapse/app/synchrotron.py
+++ b/synapse/app/synchrotron.py
@@ -399,8 +399,7 @@ class SynchrotronServer(HomeServer):
                 position = row[position_index]
                 user_id = row[user_index]
 
-                rooms = yield store.get_rooms_for_user(user_id)
-                room_ids = [r.room_id for r in rooms]
+                room_ids = yield store.get_rooms_for_user(user_id)
 
                 notifier.on_new_event(
                     "device_list_key", position, rooms=room_ids,