Add support for alternative json parsers

[thedrow]

ultrajson is a good example of a faster JSON implementation that one might want to use.
Should I create a pull request that attempts to import ultrajson as json and if it's not available import json?

[tomchristie]

Someone's already on it. See: http://django-rest-framework.org/api-guide/renderers#ultrajson

I guess they might also accept a PR to add a parser to the drf-ujson-renderer package as well as the existing renderer.

[thedrow]

Why isn't this a core feature? JSON is the most common renderer, and DRF spends a non-neglectable amount of time parsing and rendering JSON.
In any production system if I can do a drop-in replacement and have better performance I would do so.
I suggest simply importing ujson as json in the compat module if it's available.

[tomchristie]

I doubt it's that simple - does ujson support custom encoders?... https://github.com/tomchristie/django-rest-framework/blob/master/rest_framework/utils/encoders.py#L15

[thedrow]

I can check and come back to you later. In the meanwhile, please don't close issues before they are actually closed.

[thedrow]

So this is currently blocked by ultrajson/ultrajson#124. I'll keep you posted.