Hello,
has the time come to document METH_FASTCALL? This was introduced in
Python 3.6 for positional arguments only and extended in Python 3.7 to
support also keyword arguments. No changes have been made since then.
The vectorcall protocol (PEP 590) uses a calling convention based on
METH_FASTCALL, so I expect METH_FASTCALL to stay as it is. PEP 590 also
means that CPython is now even more than before optimized for
METH_FASTCALL instead of METH_VARARGS.
Whether or not METH_FASTCALL should be added to the limited API is
another question. I'm only talking about adding it to the documentation.
Jeroen.
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