From a3b1fd5195873c0b3b1214e2e93ac1c5224e9d28 Mon Sep 17 00:00:00 2001
From: Federico Ceratto <federico.ceratto@gmail.com>
Date: Mon, 23 Sep 2019 12:07:52 +0100
Subject: [PATCH] Suggest ujson.loads in documentation

Related to #341
---
 doc/src/extras.rst | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/doc/src/extras.rst b/doc/src/extras.rst
index aa316d2e..788ecf38 100644
--- a/doc/src/extras.rst
+++ b/doc/src/extras.rst
@@ -643,7 +643,10 @@ want to convert the float values from :sql:`json` into
     loads = lambda x: json.loads(x, parse_float=Decimal)
     psycopg2.extras.register_json(conn, loads=loads)
 
+By default, psycopg2 uses Python's standard library JSON implementation. Since ujson is much faster, you can improve performance with::
 
+    psycopg2.extras.register_default_json(loads=ujson.loads, globally=True)   
+    psycopg2.extras.register_default_jsonb(loads=ujson.loads, globally=True)   
 
 .. autoclass:: Json