Replace simplejson Python module

[hackdna]

Simplejson was deprecated from Django. This will reduce number of dependencies and potentially increase processing speed.

We should probably just use json module from the Python standard library.

[ngehlenborg]

There is also https://pypi.python.org/pypi/ujson.

[flekschas]

Here's a comparison of ujson against other libs: https://github.com/esnme/ultrajson#benchmarks
And another benchmark: http://blog.dataweave.in/post/87589606893/json-vs-simplejson-vs-ultrajson

UltraJSON seems superior.

[hackdna]

We should also consider compatibility with Django, maturity and popularity of the project (as a proxy for future support) in addition to performance.

[scottx611x]

Closing according to: https://docs.djangoproject.com/fr/1.5/releases/1.5/#system-version-of-simplejson-no-longer-used

simplejson is deprecated as of Django 1.5 and use of Python's stdlib json module is reccomended

See commit: 1548f6c

[hackdna]

I still find a lot of references to simplejson in the codebase (17f94e5).

[scottx611x]

@hackdna Just double checked, there are six occurrences within comments. Everything else is in celery logs.

[scottx611x]

Closing with 0c6ef29

[flekschas]

A quick question: having had a look at ujson again. Would it make sense to keep that in the backlog for the future? It outperforms the standard library under all condition and often significantly.

[hackdna]

We'll keep it mind if we see any performance problems related to JSON manipulation.

[hackdna]

@scottx611x: PyCharm found 50 occurrences of simplejson.

[scottx611x]

Using cc2648e

[scottx611x]

Closed with a4eb092