Python 3.14 and the End of the GIL

Python 3.14 introduces an optional "free-threaded" version that removes the Global Interpreter Lock (GIL), a mechanism that previously prevented true parallelism for CPU-bound tasks. This change is particularly significant for data science and machine learning, as it promises substantial performance improvements by allowing code to utilize multiple CPU cores simultaneously. The content details what the GIL is, why its removal matters, and provides a guide for installing the new GIL-free Python build. A practical code example demonstrates a significant speed improvement on a multi-threaded prime number calculation task compared to the standard GIL-enabled Python.