Limits the number of related items added to the choices dictionary on RelatedField

rest_framework/relations.py

@@ -154,7 +154,7 @@ class RelatedField(Field):
                 six.text_type(self.to_representation(item)),
                 self.display_value(item)
             )
-            for item in queryset
+            for item in queryset[:self.html_cutoff]
         ])
 
     @property