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-rw-r--r--synapse/storage/roommember.py24
1 files changed, 16 insertions, 8 deletions
diff --git a/synapse/storage/roommember.py b/synapse/storage/roommember.py
index 367dbbbcf6..7ad2198d96 100644
--- a/synapse/storage/roommember.py
+++ b/synapse/storage/roommember.py
@@ -19,6 +19,7 @@ from collections import namedtuple
 
 from ._base import SQLBaseStore
 from synapse.util.caches.descriptors import cached, cachedInlineCallbacks
+from synapse.util.stringutils import to_ascii
 
 from synapse.api.constants import Membership, EventTypes
 from synapse.types import get_domain_from_id
@@ -35,6 +36,13 @@ RoomsForUser = namedtuple(
 )
 
 
+# We store this using a namedtuple so that we save about 3x space over using a
+# dict.
+ProfileInfo = namedtuple(
+    "ProfileInfo", ("avatar_url", "display_name")
+)
+
+
 _MEMBERSHIP_PROFILE_UPDATE_NAME = "room_membership_profile_update"
 
 
@@ -422,20 +430,20 @@ class RoomMemberStore(SQLBaseStore):
         )
 
         users_in_room = {
-            row["user_id"]: {
-                "display_name": row["display_name"],
-                "avatar_url": row["avatar_url"],
-            }
+            to_ascii(row["user_id"]): ProfileInfo(
+                avatar_url=to_ascii(row["avatar_url"]),
+                display_name=to_ascii(row["display_name"]),
+            )
             for row in rows
         }
 
         if event is not None and event.type == EventTypes.Member:
             if event.membership == Membership.JOIN:
                 if event.event_id in member_event_ids:
-                    users_in_room[event.state_key] = {
-                        "display_name": event.content.get("displayname", None),
-                        "avatar_url": event.content.get("avatar_url", None),
-                    }
+                    users_in_room[to_ascii(event.state_key)] = ProfileInfo(
+                        display_name=to_ascii(event.content.get("displayname", None)),
+                        avatar_url=to_ascii(event.content.get("avatar_url", None)),
+                    )
 
         defer.returnValue(users_in_room)