Make get_if_app_services_interested_in_user faster

1 files changed, 22 insertions, 9 deletions

diff --git a/synapse/storage/appservice.py b/synapse/storage/appservice.py
index 0e9e8d3452..532df736a5 100644
--- a/synapse/storage/appservice.py
+++ b/synapse/storage/appservice.py
@@ -13,6 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 import logging
+import re
 import simplejson as json
 from twisted.internet import defer
 
@@ -36,19 +37,31 @@ class ApplicationServiceStore(SQLBaseStore):
             hs.config.app_service_config_files
         )
 
+        # We precompie a regex constructed from all the regexes that the AS's
+        # have registered for exclusive users.
+        exclusive_user_regexes = [
+            regex.pattern
+            for service in self.services_cache
+            for regex in service.get_exlusive_user_regexes()
+        ]
+        if exclusive_user_regexes:
+            exclusive_user_regex = "|".join("(" + r + ")" for r in exclusive_user_regexes)
+            self.exclusive_user_regex = re.compile(exclusive_user_regex)
+        else:
+            # We handle this case specially otherwise the constructed regex
+            # will always match
+            self.exclusive_user_regex = None
+
     def get_app_services(self):
         return self.services_cache
 
-    def get_if_app_services_interested_in_user(self, user_id, exclusive=False):
-        """Check if the user is one associated with an app service
+    def get_if_app_services_interested_in_user(self, user_id):
+        """Check if the user is one associated with an app service (exclusively)
         """
-        for service in self.services_cache:
-            if service.is_interested_in_user(user_id):
-                if exclusive:
-                    return service.is_exclusive_user(user_id)
-                else:
-                    return True
-        return False
+        if self.exclusive_user_regex:
+            return bool(self.exclusive_user_regex.match(user_id))
+        else:
+            return False
 
     def get_app_service_by_user_id(self, user_id):
         """Retrieve an application service from their user ID.