The single biggest new feature in Python 3.13 is something Python users have anticipated for ages: a version of Python that allows full concurrency, or multi-threading, by removing the Global ...

For multi-threaded workloads, the lack of a GIL allows it to shine, blowing past the default interpreter with an 18x speedup by running 20 threads. Not too shabby. As for merging into mainline ...

Given the vast majority of Python applications are single-threaded, this was a poor trade-off. Although refinements to the GIL have improved its handling of multi-threaded apps, it’s still a ...