PyPy is much faster for many workloads. It's a garbage collected just-in-time compiler and mostly compatible with the CPython runtime (the one you get from pyth

PyPy is much faster for many workloads. It's a garbage collected just-in-time compiler and mostly compatible with the CPython runtime (the one you get from python.org). It also happens to be written in a subset of Python which is pretty neat. The CPython API exposes a bunch of details specific to the CPython implementation (like object reference counts) and so hasn't historically been supported in PyPy (which supports the whole language but internally is very different). It sounds like it would be a pain to do but the PyPy team thinks it's feasible to build.