From cad0af2aae4eda11aafca9323292629391fbf079 Mon Sep 17 00:00:00 2001
From: INADA Naoki <songofacandy@gmail.com>
Date: Fri, 6 Jul 2018 16:48:47 +0900
Subject: [PATCH 1/3] bpo-23493: json: Optimize sort_keys in Python encoder

Stop using key=lambda idiom.  This behavior is same to
C version encoder.
---
 Lib/json/encoder.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Lib/json/encoder.py b/Lib/json/encoder.py
index fb083ed61bb1f8..2d7b8989c711da 100644
--- a/Lib/json/encoder.py
+++ b/Lib/json/encoder.py
@@ -350,7 +350,7 @@ def _iterencode_dict(dct, _current_indent_level):
             item_separator = _item_separator
         first = True
         if _sort_keys:
-            items = sorted(dct.items(), key=lambda kv: kv[0])
+            items = sorted(dct.items())
         else:
             items = dct.items()
         for key, value in items:

From 452d5c286830913172b38e1b512a2034230ca6e9 Mon Sep 17 00:00:00 2001
From: INADA Naoki <songofacandy@gmail.com>
Date: Fri, 6 Jul 2018 16:52:12 +0900
Subject: [PATCH 2/3] Add news

---
 .../NEWS.d/next/Library/2018-07-06-16-52-08.bpo-23493.xAuPmu.rst | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 Misc/NEWS.d/next/Library/2018-07-06-16-52-08.bpo-23493.xAuPmu.rst

diff --git a/Misc/NEWS.d/next/Library/2018-07-06-16-52-08.bpo-23493.xAuPmu.rst b/Misc/NEWS.d/next/Library/2018-07-06-16-52-08.bpo-23493.xAuPmu.rst
new file mode 100644
index 00000000000000..1b167d3df139dc
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2018-07-06-16-52-08.bpo-23493.xAuPmu.rst
@@ -0,0 +1 @@
+Optimize ``sort_keys`` option of pure Python JSON encoder.

From 5d41abd16d558f78a91a04902a1a6700fdb834f0 Mon Sep 17 00:00:00 2001
From: INADA Naoki <songofacandy@gmail.com>
Date: Sat, 7 Jul 2018 02:20:44 +0900
Subject: [PATCH 3/3] Remove news

---
 .../NEWS.d/next/Library/2018-07-06-16-52-08.bpo-23493.xAuPmu.rst | 1 -
 1 file changed, 1 deletion(-)
 delete mode 100644 Misc/NEWS.d/next/Library/2018-07-06-16-52-08.bpo-23493.xAuPmu.rst

diff --git a/Misc/NEWS.d/next/Library/2018-07-06-16-52-08.bpo-23493.xAuPmu.rst b/Misc/NEWS.d/next/Library/2018-07-06-16-52-08.bpo-23493.xAuPmu.rst
deleted file mode 100644
index 1b167d3df139dc..00000000000000
--- a/Misc/NEWS.d/next/Library/2018-07-06-16-52-08.bpo-23493.xAuPmu.rst
+++ /dev/null
@@ -1 +0,0 @@
-Optimize ``sort_keys`` option of pure Python JSON encoder.