> PyPy is Python implemented largely in Python It's actually a superset of a subset of Python and it's called RPython: http://rpython.readthedocs.io/en/latest/

> PyPy is Python implemented largely in Python It's actually a superset of a subset of Python and it's called RPython: http://rpython.readthedocs.io/en/latest/rpython.html http://rpython.readthedocs.io/en/latest/rpython.html > it supposedly is faster than python's C implementation Only if its JIT compiler gets a chance to trace and compile some code which is then executed often enough to make up for the overhead.