Python Program running a lot slower after change to Ubuntu

[Serafim]

There might be a million reasons. Normally Python is faster on Linux than on Windows and the fastest version is said to be the latest.

First: Is it the same Python implementation and version on both systems?

PyPi is also said to be a faster interpretor than the standard one.
Then there are CPython and Nuitka, where Nuitka is said to be the fastest.

For info look at e.g. https://realpython.com/pypy-faster-python/

https://www.javatpoint.com/which-is-the-...-of-python

You also have performance tips on
https://wiki.python.org/moin/PythonSpeed...rmanceTips