Everything you need to know about Python 3.13 #Python
drew’s dev blog posts on everything you need to know about Python 3.13 – JIT and GIL went up the hill
So what makes this release different, and why should you care about it?
In short, there are two big changes being made to how Python runs at a core level which have the potential to radically change the performance profile of Python code in the future.
Those changes are:
A “free-threaded” version of CPython which allows you to disable the Global Interpreter Lock (GIL), and
Support for experimental Just-in-Time (JIT) compilation.
Python 3.13 is a big release in introducing some exciting new concepts and features to the runtime. It’s unlikely to make any immediate different to how you write and run your Python, but it’s likely that over the next few months and years as both free-threading and JIT become more mature and well established, they’ll begin to have more and more of an impact on the performance profile of Python code, particularly for CPU-bound tasks.
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