remove ordereddict for performance reasons

src/c3nav/mapdata/models/base.py

@@ -27,7 +27,7 @@ class SerializableMixin(models.Model):
         ))
 
     def _serialize(self, include_type=False, **kwargs):
-        result = OrderedDict()
+        result = {}
         if include_type:
             result['type'] = self.__class__.__name__.lower()
         result['id'] = self.pk

src/c3nav/mapdata/models/locations.py

@@ -1,4 +1,3 @@
-from collections import OrderedDict
 from contextlib import suppress
 from operator import attrgetter
 
@@ -105,7 +104,7 @@ class Location(LocationSlug, AccessRestrictionMixin, TitledMixin, models.Model):
         if not detailed:
             fields = ('id', 'type', 'slug', 'title', 'subtitle', 'icon', 'point', 'bounds', 'grid_square',
                       'locations', 'on_top_of')
-            result = OrderedDict(((name, result[name]) for name in fields if name in result))
+            result = {name: result[name] for name in fields if name in result}
         return result
 
     def _serialize(self, **kwargs):