Welcome to PyPy
PyPy is a fast, compliant alternative implementation of the Python
language (2.7.10 and 3.3.5). It has several advantages and distinct features:
Speed: thanks to its Just-in-Time compiler, Python programs
often run faster on PyPy. (What is a JIT compiler?)
“If you want your code to run faster, you should probably just use PyPy.”
— Guido van Rossum (creator of Python)
Memory usage: memory-hungry Python programs (several hundreds of
MBs or more) might end up taking less space than they do in CPython.
Compatibility: PyPy is highly compatible with existing python code.
It supports cffi and can run popular python libraries like twisted
Stackless: PyPy comes by default with support for stackless mode,
providing micro-threads for massive concurrency.
As well as other features.
Download and try out PyPy
Want to know more? A good place to start is our detailed speed and