From 7d6a1dae31c96379f29bc9e4191d2c02f1dad640 Mon Sep 17 00:00:00 2001
From: Erik Johnston <erik@matrix.org>
Date: Thu, 14 May 2015 14:27:58 +0100
Subject: [PATCH] Jump out early

---
 synapse/storage/_base.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/synapse/storage/_base.py b/synapse/storage/_base.py
index e44821b5ec..1a76b22e4f 100644
--- a/synapse/storage/_base.py
+++ b/synapse/storage/_base.py
@@ -883,6 +883,12 @@ class SQLBaseStore(object):
 
         missing_events_ids = [e for e in event_ids if e not in event_map]
 
+        if not missing_events_ids:
+            defer.returnValue([
+                event_map[e_id] for e_id in event_ids
+                if e_id in event_map and event_map[e_id]
+            ])
+
         def get_missing(txn):
             missing_events = unwrap_deferred(self._fetch_events(
                 txn,