Don't load all posts when only last are required

boards/models/thread.py

@@ -184,7 +184,7 b' class Thread(models.Model):'
             'images', 'thread', 'threads', 'attachments')
         if view_fields_only:
             query = query.defer('poster_ip')
-        return query.all()
+        return query
 
     def get_top_level_replies(self) -> QuerySet:
         return self.get_replies().exclude(refposts__threads__in=[self])