Python Steering Council halts native JIT compiler development for CPython

The Python Steering Council paused work on CPython's native JIT compiler. The project stalled over a rejected PEP lacking success metrics, high maintenance costs, and risks to C-extension and ABI compatibility.

• The JIT aimed to speed up Python by compiling bytecode to machine code
• Its PEP failed to gain consensus on measuring gains versus maintenance costs
• Risks included breaking C extensions and conflicts with the GIL and garbage collector
• The council favors relying on PyPy and Numba instead of a native JIT