The fat module is a Python extension module (written in C) implementing fast guards. The fatoptimizer optimizer uses fat guards to specialize functions. fat guards are used to verify assumptions used to specialize the code. If an assumption is no more true, the specialized code is not used.

The fat module is required to run code optimized by fatoptimizer if at least one function is specialized.

• fat documentation
• fat project at GitHub
• fat project at the Python Cheeseshop (PyPI)
• fatoptimizer documentation
• FAT Python

The fat module requires a Python 3.6 patched with PEP 510 patch.