ujson

Ultra fast JSON encoder and decoder for Python

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Maintainers

cgbystrom hugovk Jonas.Tarnstrom rstms

These details have not been verified by PyPI

Project links

Project description

UltraJSON

UltraJSON is an ultra fast JSON encoder and decoder written in pure C with bindings for Python 2.5+ and 3.

To install it just run Pip as usual:

$ pip install ujson

Usage

May be used as a drop in replacement for most other JSON parsers for Python:

>>> import ujson
>>> ujson.dumps([{"key": "value"}, 81, True])
'[{"key":"value"},81,true]'
>>> ujson.loads("""[{"key": "value"}, 81, true]""")
[{u'key': u'value'}, 81, True]

Benchmarks

UltraJSON calls/sec compared to three other popular JSON parsers with performance gain specified below each.

Test machine:

Linux version 2.6.32-131.0.15.el6.x86_64

Versions:

ujson: 1.21
simplejson: 2.6.2
cjson: 1.05
yajl: 0.3.5
Python: Python 2.6.6 (r266:84292, Jul 20 2011, 10:22:43)

	ujson	simplejson	cjson	yajl
Array with 256 utf-8 strings
Encode	4090,74	899,39	83,86	3189,86
		4,55	48,78	1,28
Decode	863,29	586,15	201,61	352,48
		1,47	4,28	2,45
Medium complex object
Encode	9750,37	1377,15	1512,06	3341,91
		7,08	6,45	2,92
Decode	5576,75	4247,16	3587,83	2850,13
		1,31	1,55	1,96
Array with 256 strings
Encode	17998,01	12954,46	8715,02	15924,35
		1,39	2,07	1,13
Decode	14540,71	19696,13	14908,46	9547,14
		0,74	0,98	1,52
Array with 256 doubles
Encode	2185,20	1466,87	1956,99	3421,10
		1,49	1,12	0,64
Decode	16062,01	8990,50	9743,40	8331,74
		1,79	1,65	1,93
Array with 256 True values
Encode	69767,60	25202,56	41145,99	64330,76
		2,77	1,70	1,08
Decode	91416,02	56439,97	54918,09	42786,02
		1,62	1,66	2,14
Array with 256 dict{string, int} pairs

Encode	11307,54	1830,45	2720,90	7725,56
		6,18	4,16	1,46
Decode	8695,94	7572,89	6076,71	5231,32
		1,15	1,43	1,66
Dict with 256 arrays with 256 dict
Encode	37,76	4,88	10,49	27,62
		7,74	3,60	1,37
Decode	17,70	15,56	11,25	12,00
		1,14	1,57	1,47

Project details

These details have been verified by PyPI

Maintainers

cgbystrom hugovk Jonas.Tarnstrom rstms

These details have not been verified by PyPI

Project links

Release history Release notifications | RSS feed

5.10.0

May 14, 2024

5.9.0

Dec 10, 2023

5.8.0

Jun 11, 2023

5.7.0

Jan 6, 2023

5.6.0

Dec 1, 2022

5.5.0

Sep 15, 2022

5.4.0

Jul 2, 2022

5.3.0

May 18, 2022

5.2.0

Apr 5, 2022

5.1.0

Dec 20, 2021

5.0.0

Dec 16, 2021

4.3.0

Nov 22, 2021

4.2.0

Sep 22, 2021

4.1.0

Aug 16, 2021

4.0.2

Jan 21, 2021

4.0.1

Oct 9, 2020

4.0.0

Oct 7, 2020

3.2.0

Sep 8, 2020

3.1.0

Aug 2, 2020

3.0.0

Jun 3, 2020

2.0.3

Mar 24, 2020

2.0.2

Mar 15, 2020

2.0.1

Mar 8, 2020

2.0.0

Mar 7, 2020

1.35

Jan 20, 2016

1.34

Nov 30, 2015

1.33

Jun 11, 2013

1.30

Feb 18, 2013

1.23

Nov 6, 2012

1.22

Oct 1, 2012

This version

1.21

Oct 1, 2012

1.19

Jun 26, 2012

1.18

Feb 7, 2012

1.15

Dec 14, 2011

1.9

Sep 19, 2011

1.8

Sep 9, 2011

1.6

Aug 17, 2011

1.4

Jun 16, 2011

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