In our specific case the value would be an offset added to the
PyObject*, and there we would find a pointer to a C function (together
with a 64-bit signature), and calling that C function (after checking
the 64 bit signature) is our final objective.
And what the C function does really is faster than the lookup through
a dictionary? I find that hard to believe.
I still think this is out of scope for python-dev. If this is something
you want to be able to do for Python 2.4 as well, then you don't need
any change to Python - you can do whatever you come up with for all
Python versions, no need to (or point in) changing Python 3.4 (say).
We can go ahead and hijack tp_flags bit 22 to make things work in
existing versions. But what if Python 3.8 then starts using that bit for
something else?
Use flag bit 23 in Python 3.8. You know at compile time what Python
version you have.
As this is apparently only relevant to speed fanatics, too, I suggest
that you check how fast PyPI works for you.
Did you mean PyPy?
Oops, yes - Freudian slip :-)
Regards,
Martin
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