How to speed up json decode and encode operations in Python?

Question

I've been using the json module in python 2.6 but is very slow. I'd like to use a faster implementation. I've seen cjson but seems the development is not coing on and the api is different from the json module. I have also read some comments about a way to speed up json.

Any ideas?

Thanks. In my linux installation I have json. simplejson and _json. Only the lastone seems to be written in C. — Juanjo Conti
– Juanjo Conti, Commented Mar 1, 2011 at 18:41
This was a known issue in 2.6 and has been fixed. This question is a duplicate of stackoverflow.com/questions/706101/… as Orbit noted, and should be closed. See that question for lots of benchmark data. — smci
– smci, Commented Apr 26, 2013 at 11:59

ʇsәɹoɈ · Accepted Answer · 2011-03-01 18:52:07Z

7

The most recent versions of simplejson are considerably faster than the one built in to python 2.6, and have the same API. If you want your python code to continue working even when simplejson is not installed, try this:

try:
    import simplejson as json
except ImportError:
    import json

2 Comments

Juanjo Conti Over a year ago

But what about simplejson._speedups module? Is it used by default or do I need to do something more?

ʇsәɹoɈ Over a year ago

If you build & install the current version of simplejson on a supported platform, speedups will be used automatically.

nmichaels · Accepted Answer · 2011-03-01 18:50:05Z

1

For encoding, you can use iterencode. It uses less memory for the string, so serializing very large data structures takes considerably less time.

answered Mar 1, 2011 at 18:50

nmichaels

51.2k12 gold badges113 silver badges137 bronze badges

Collectives™ on Stack Overflow

How to speed up json decode and encode operations in Python?

2 Answers 2

2 Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related