[kossae]

> The typing module is one of the heaviest and slowest modules in the standard library even with all the optimizations made.

Have you noticed any decreases in performance using core typing?

[kbd]

For those wondering, like I was, where that quote comes from, it's from PEP 560 "Core support for typing module and generic types" - https://www.python.org/dev/peps/pep-0560/