gil

Runloom is a new Python library that provides Go-style stackful coroutines and a work-stealing scheduler for free-threaded Python (3.13t/3.14t), allowing blocking code to run concurrently across cores without the GIL. It claims to match or beat Go in spawn throughput and scheduling performance.

Thomas Wouters gives a talk at PyCon US 2026 on the past, present, and future of free-threaded Python, which removes the global interpreter lock (GIL) to allow parallel thread execution.

Python 3.14 introduces the ability to disable the Global Interpreter Lock (GIL), enabling true parallel execution of multi-threaded code, overcoming a long-standing limitation.