http://www.corsix.org/content/micro-optimisations-can-speed-up-cpython
https://www.corsix.org/content/compilers-cpython-interpreter-main-loop https://www.corsix.org/content/why-are-slots-so-slow -- Steve “Cheer up,” they said, “things could be worse.” So I cheered up, and sure enough, things got worse. -- https://mail.python.org/mailman/listinfo/python-list
