Tim Peters 51ed2c56a1
bpo-45530: speed listobject.c's unsafe_tuple_compare() (GH-29076)
Keep track of whether unsafe_tuple_compare() calls are resolved by the very
first tuple elements, and adjust strategy accordingly. This can significantly
cut the number of calls made to the full-blown PyObject_RichCompareBool(),
and especially when duplicates are rare.

Co-authored-by: Łukasz Langa <lukasz@langa.pl>
2021-10-24 22:27:24 -05:00
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