Python 3.13's free-threading feature has been released, allowing for concurrent execution without the Global Interpreter Lock (GIL). This change aims to improve performance in multi-core processors, addressing limitations of traditional multiprocessing methods such as memory overhead, communication costs, and startup time.

The new feature is still experimental and not recommended for production use due to potential slowdowns. However, initial tests suggest a significant impact on parallel application performance, offering an alternative to multiprocessing.

Source: https://codspeed.io/blog/state-of-python-3-13-performance-free-threading