Possible performance regression from 2.6.1 to 4.0.0
Created originally on Bitbucket by oberstet (Tobias Oberstein)
I've done some measurements comparing JSON and MsgPack serialization/deserialization performance
MsgPack deserialization seems significantly slower (>30%), e.g.
PyPy 4.0.0: 23642935 objs/sec PyPy 2.6.1: 32081015 objs/sec
Note: the MsgPack library used (https://github.com/msgpack/msgpack-python) runs pure Python code when on PyPy and uses PyPy's string builder (https://github.com/msgpack/msgpack-python/blob/master/msgpack/fallback.py).