= pypy =
https://pypy.org/features.html

PyPy is a replacement for CPython. It is built using the RPython language that was co-developed with it. The main reason to use it instead of CPython is speed: it runs generally faster.

https://pypy.org/compat.html
PyPy implements the Python language version 2.7.13

https://doc.pypy.org/en/latest/architecture.html

Our main motivation for developing the translation framework is to provide a full featured, customizable, fast and very compliant Python implementation, working on and interacting with a large variety of platforms and allowing the quick introduction of new advanced language features.

JIT Compiler

Just-in-Time Compiler (JIT): we have a tracing JIT that traces the interpreter written in RPython, rather than the user program that it interprets

== Install on CentOS ==
 * yum install pypy # version 5.0.1