Why is python so much slower on windows?

Question

I learned about pystones today and so I decided to see what my various environments were like. I ran pystones on my laptop that is running windows on the bare metal and got

Answer 1

Had similar problem on windows 10 - it was because of windows defender.

I had to exclude python directories and process in windows defender settings and restart computer.

Before: I had to wait like ~20 seconds to run any python code - now it's milliseconds.