Python 3.13 Allows Disabling of the GIL + subinterpreters

Python 3.13 adds the ability to remove the Global Interpreter Lock (GIL) per PEP 703. Just this past week, a PR was merged that allows the disabling of the GIL using a command-line flag or an environment variable in free-threaded builds. Note that Python must be built using the Py_GIL_DISABLED flag for this to work.

What is the GIL?

The Global Interpreter…