Message 402886 - Python tracker

> IMO, we should note in What's New that only for Windows, 3.10.0 has a slight slowdown.

I disagree. This is a regression/bug and we don't advertise "known bugs" in the what's new, the same for any other bugfix that has been delayed until 3.10.1

>  Some use cases are slower (by >10%!)

Can you still reproduce this with PR 28475?