Add cache layer to state group resolution

1 files changed, 9 insertions, 1 deletions

diff --git a/synapse/util/__init__.py b/synapse/util/__init__.py
index 4e837a918e..1fd5ba5787 100644
--- a/synapse/util/__init__.py
+++ b/synapse/util/__init__.py
@@ -15,7 +15,7 @@
 
 from synapse.util.logcontext import LoggingContext
 
-from twisted.internet import reactor
+from twisted.internet import reactor, task
 
 import time
 
@@ -35,6 +35,14 @@ class Clock(object):
         """Returns the current system time in miliseconds since epoch."""
         return self.time() * 1000
 
+    def looping_call(self, f, msec):
+        l = task.LoopingCall(f)
+        l.start(msec/1000.0, now=False)
+        return l
+
+    def looping_call(self, loop):
+        loop.stop()
+
     def call_later(self, delay, callback):
         current_context = LoggingContext.current_context()