diff --git a/endpoints/web.py b/endpoints/web.py
index d89d72f70..75aee0858 100644
--- a/endpoints/web.py
+++ b/endpoints/web.py
@@ -41,6 +41,7 @@ from util.useremails import send_email_changed
 
 _route_data = None
 
+@lru_cache(maxsize=1)
 def _get_route_data():
   global _route_data
   if _route_data: