From 3a2ad8e68c669eebcc9847e6c2a664e323e8da1d Mon Sep 17 00:00:00 2001
From: imdark <mikesgoacademy@gmail.com>
Date: Wed, 17 May 2017 11:49:30 -0700
Subject: [PATCH 1/3] in order to solve the memory leak at #5146

Large encoded string take a very long time to to release from memory, but if we just pass the stream directly into json.load we get much better memory performance.
---
 rest_framework/parsers.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/rest_framework/parsers.py b/rest_framework/parsers.py
index 238382364..1a4c24387 100644
--- a/rest_framework/parsers.py
+++ b/rest_framework/parsers.py
@@ -22,6 +22,7 @@ from django.utils.six.moves.urllib import parse as urlparse
 
 from rest_framework import renderers
 from rest_framework.exceptions import ParseError
+import codecs
 
 
 class DataAndFiles(object):
@@ -61,8 +62,8 @@ class JSONParser(BaseParser):
         encoding = parser_context.get('encoding', settings.DEFAULT_CHARSET)
 
         try:
-            data = stream.read().decode(encoding)
-            return json.loads(data)
+            decoded_stream = codecs.decode(stream, encoding)
+            return json.load(decoded_stream)
         except ValueError as exc:
             raise ParseError('JSON parse error - %s' % six.text_type(exc))
 

From 9a2281167178999ad0472d3c9862af91c077322c Mon Sep 17 00:00:00 2001
From: imdark <mikesgoacademy@gmail.com>
Date: Wed, 24 May 2017 17:56:49 -0700
Subject: [PATCH 2/3] modified to use a reader

modified to use a reader since direct decoding is not supported
---
 rest_framework/parsers.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/rest_framework/parsers.py b/rest_framework/parsers.py
index 1a4c24387..817efd2da 100644
--- a/rest_framework/parsers.py
+++ b/rest_framework/parsers.py
@@ -7,6 +7,7 @@ on the request, such as form content or json encoded data.
 from __future__ import unicode_literals
 
 import json
+import codecs
 
 from django.conf import settings
 from django.core.files.uploadhandler import StopFutureHandlers
@@ -22,7 +23,6 @@ from django.utils.six.moves.urllib import parse as urlparse
 
 from rest_framework import renderers
 from rest_framework.exceptions import ParseError
-import codecs
 
 
 class DataAndFiles(object):
@@ -62,7 +62,7 @@ class JSONParser(BaseParser):
         encoding = parser_context.get('encoding', settings.DEFAULT_CHARSET)
 
         try:
-            decoded_stream = codecs.decode(stream, encoding)
+            decoded_stream = codecs.getreader(encoding)(stream)
             return json.load(decoded_stream)
         except ValueError as exc:
             raise ParseError('JSON parse error - %s' % six.text_type(exc))

From cdeab1c490fa1073ce985b227e85bbdc56cb08c2 Mon Sep 17 00:00:00 2001
From: imdark <mikesgoacademy@gmail.com>
Date: Wed, 24 May 2017 18:12:38 -0700
Subject: [PATCH 3/3] fixed to pass isort linting

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

diff --git a/rest_framework/parsers.py b/rest_framework/parsers.py
index 817efd2da..0e40e1a7a 100644
--- a/rest_framework/parsers.py
+++ b/rest_framework/parsers.py
@@ -6,8 +6,8 @@ on the request, such as form content or json encoded data.
 """
 from __future__ import unicode_literals
 
-import json
 import codecs
+import json
 
 from django.conf import settings
 from django.core.files.uploadhandler import StopFutureHandlers