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> More generally though, this would be improved by precompiling some of the information (like Argument Clinic does, perhaps).
The same idea was already proposed to optimize str%args and str.format(args). struct.unpack() does also compile the format into an optimize structure (and have a cache).
We may do something like Martin von Loewis's _Py_IDENTIFIER API: compile at runtime at the first call, and cache the result in a static variable.
It's not a tiny project, and I don't know exactly how to build a "JIT compiler" for getargs.c, nor how complex it would be. But it would speed up *all* Python calls, so any Python application.