Python 3.13 Preview: Free Threading and a JIT Compiler - Real Python
Briefly

Free threading in Python 3.13 aims to remove the Global Interpreter Lock (GIL), allowing true thread-based parallelism and leveraging multicore processors more efficiently.
The JIT compiler introduced in Python 3.13 enhances performance by compiling Python bytecode to machine code at runtime, improving execution speed significantly for certain applications.
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