The types are ignored at runtime; they’re annotations. I guess they could still theoretically have some impact, but it should be negligible. Compiled mypy is a

The types are ignored at runtime; they’re annotations. I guess they could still theoretically have some impact, but it should be negligible. Compiled mypy is a stated potential goal - but outside the scope of this project itself. Read more here: https://mypy.readthedocs.io/en/stable/faq.html#will-static-typing-make-my-programs-run-faster https://mypy.readthedocs.io/en/stable/faq.html#will-static-t...