Don't use Py_BuildValue("(OO...)", a, b, ...)

[nineteendo]

Feature or enhancement

Proposal:

This is an inefficient way to build a tuple:

Py_BuildValue("(OO)", a, b)

This is faster, and more readable:

PyTuple_Pack(2, a, b)

And if #118222 lands, we could use this even faster variant for length 1 & 2:

PyTuple_Pack2( a, b)

Has this already been discussed elsewhere?

No response given

Links to previous discussion of this feature:

No response

Linked PRs

• gh-118379: Use PyTuple_Pack #118381

[serhiy-storchaka]

I already did something similar recently: #110093.