Maybe our information is out of date, but here's what we learned:

https://github.com/jsonpickle/jsonpickle/commit/0b97652e4102...

jsonpickle: Remove cjson support

"First, please don't use cjson for anything. It's got multiple bugs and misfeatures, and is generally unsuited for anything except impressive benchmarks. It was easier to write my own library, from scratch, than try to fix cjson."

-- John Millikin, author of jsonlib