Improve QuerySet performance by removing limit on server-side chunking (#347)

Author: Jibola

django_mongodb_backend/compiler.py

@@ -258,7 +258,6 @@ def execute_sql(
             else:
                 return self._make_result(obj, self.columns)
         # result_type is MULTI
-        cursor.batch_size(chunk_size)
         result = self.cursor_iter(cursor, chunk_size, self.columns)
         if not chunked_fetch:
             # If using non-chunked reads, read data into memory.

docs/source/releases/5.1.x.rst

@@ -11,6 +11,7 @@ Django MongoDB Backend 5.1.x
   the ``base_field`` uses a database converter.
 - Fixed ``RecursionError`` when using ``Trunc`` database functions on non-MongoDB
   databases.
+- Improved ``QuerySet`` performance by removing low limit on server-side chunking.
 
 5.1.0 beta 3
 ============

docs/source/releases/5.2.x.rst

@@ -25,6 +25,7 @@ Bug fixes
   databases.
 - :meth:`QuerySet.explain() <django.db.models.query.QuerySet.explain>` now
   :ref:`returns a string that can be parsed as JSON <queryset-explain>`.
+- Improved ``QuerySet`` performance by removing low limit on server-side chunking.
 
 5.2.0 beta 1
 ============