Short demo of using Cython, setting language_level, compare runtimes, ...

cython_demo

#!/bin/bash
pip install setuptools Cython gmpy2

rm -rf /tmp/tst && mkdir /tmp/tst && cd /tmp/tst

wget -q https://gist.githubusercontent.com/Hermann-SW/061d33b47325bd15a4033b33d3f7c4c9/raw/9900616d98b6acdd50c436d9ae914a1c5d81f2b2/sq2_cg.py
mv sq2_cg.py sq2_cg.pyx

cat << EOF > setup.py
from setuptools import setup
from Cython.Build import cythonize

setup( ext_modules = cythonize("sq2_cg.pyx", language_level=3) )
EOF

python setup.py build_ext --inplace > log

echo "import sq2_cg" > import.py

echo -n "sq2_cg.pyx: " && python sq2_cg.pyx > out
echo -n "import.py:  " && python import.py > out2
echo "diff:" && diff out out2

https://forums.raspberrypi.com/viewtopic.php?t=352039