use PyIter_NextItem during iteration#5661
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bschoenmaeckers merged 5 commits intoPyO3:mainfrom Jan 13, 2026
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Seems like there is a minor performance loss in (e.g.) set iteration. Looks like the set iterator has a |
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For generic iterators, this does seem to be slightly faster: 
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davidhewitt
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Nov 30, 2025
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Possibly more interesting after #5660 which will show if there is any benchmark improvement here :)