bring a small computation out of a loop

casexml/apps/case/models.py

@@ -729,21 +729,21 @@ def _apply_action(self, action):
         else:
             raise ValueError("Can't apply action of type %s" % action.action_type)
 
-
     def apply_updates(self, update_action):
         """
         Applies updates to a case
         """
         for k, v in update_action.updated_known_properties.items():
             setattr(self, k, v)
 
+        properties = self.properties()
         for item in update_action.updated_unknown_properties:
             if item not in const.CASE_TAGS:
                 value = couchable_property(update_action.updated_unknown_properties[item])
-                if isinstance(self.properties().get(item), StringProperty):
+                if isinstance(properties.get(item), StringProperty):
                     value = unicode(value)
                 self[item] = value
-            
+
     def apply_attachments(self, attachment_action):
         #the actions and _attachment must be added before the first saves canhappen
         #todo attach cached attachment info