4 tips for getting started with free-threaded Python
The introduction of free-threaded or 'no-GIL' builds in Python 3.13 was one of the biggest architectural changes to the CPython interpreter since its creation.
Achieving True Parallelism with ZIO: Fibers, Threads, and Cooperative Scheduling
Fibers in ZIO are lightweight, user space threads, essentially "green threads" managed by the ZIO runtime, not the OS. They are extremely cheap to create and can scale in the tens of thousands without the memory overhead of OS threads.