• Setup Pyenv https://github.com/pyenv/pyenv
• Install PyPy

pyenv install pypy2-5.7.1

• Install Python 2.7.13

pyenv install 2.7.13

• Run demo w/ cpython

pyenv shell 2.7.13
python fibonacci.py 32
32 fibonacci number is: 2178309 found in 2.07093s

• Run demo w/ pypy

pyenv shell pypy2-5.7.1
python fibonacci.py 32
32 fibonacci number is: 2178309 found in 0.117313s