Feature or enhancement

Proposal:

In _PyLong_Negate there is a fast path for unique referenced longs. The slow path assumes the argument is a small int. We can add an assert for this condition, and remove the final decref (small ints are immortal).

Has this already been discussed elsewhere?

No response given

Links to previous discussion of this feature:

No response

Linked PRs

• gh-143050: Remove redundant decref in _PyLong_Negate (gh-143051) #143051
• Revert "gh-143050: Remove redundant decref in _PyLong_Negate (gh-143051)" #145891
• gh-143050: correct PyLong_FromString() to use _PyLong_Negate() #145901
• [3.14] gh-143050: Correct PyLong_FromString() to use _PyLong_Negate() (GH-145901) #147331
• [3.13] gh-143050: Correct PyLong_FromString() to use _PyLong_Negate() (#145901) #147437
• gh-143050: add helper _PyLong_InitTag() #147956