[issue26200] SETREF adds unnecessary work in some cases

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

I wrote PR 23209 to add Py_SetRef() and Py_XSetRef() functions to the limited C API and the stable ABI. Py_SETREF() and Py_XSETREF() macros are excluded from the limited C API and some extension modules cannot use them, like extension modules written in Rust.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue26200>
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