[issue37863] Speed up hash(fractions.Fraction)

[Mark Dickinson]

Mark Dickinson <dickinsm at gmail.com> added the comment:

> Indeed, I bet it would pay in `long_pow()` to add another test, under the `if (Py_SIZE(b) < 0)` branch, to skip the exponentiation part entirely when b is -1.

Agreed.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37863>
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