From 483995878a0d0063ee6f2076096c4bb595e0c41a Mon Sep 17 00:00:00 2001
From: liuzhichao <2663412229@qq.com>
Date: Fri, 26 Oct 2018 11:06:03 +0800
Subject: [PATCH] change `ListSerializer`'s all to iterator. Under a lot of
 data, the `iterator` better than `all`

---
 rest_framework/serializers.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rest_framework/serializers.py b/rest_framework/serializers.py
index 110ffbfa9..8e8383e28 100644
--- a/rest_framework/serializers.py
+++ b/rest_framework/serializers.py
@@ -677,7 +677,7 @@ class ListSerializer(BaseSerializer):
         """
         # Dealing with nested relationships, data can be a Manager,
         # so, first get a queryset from the Manager if needed
-        iterable = data.all() if isinstance(data, models.Manager) else data
+        iterable = data.iterator() if isinstance(data, models.Manager) else data
 
         return [
             self.child.to_representation(item) for item in iterable