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Author corona10
Recipients ammar2, corona10, mark.dickinson, pablogsal, serhiy.storchaka, vstinner
Date 2020-10-02.03:50:51
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> s there reason to believe that range.index is performed often enough that it's worth the extra code and maintenance cost here?

There are at least 3 reasons
1. pointer comparaition optimization quite common usecase in CPython codebase. e.x) list.count
2. if you create the range object, step = 1 which is singleton object is quite high percentage use case.
   - range(100) -> step = 1
   - range(-100, 100) -> step =1
   - range(-100, 100, 2) -> step != 1
3. fast path code does not cost high difficulty maintainence for this case but can bring 12% performance enhancement.
Date User Action Args
2020-10-02 03:50:52corona10setrecipients: + corona10, mark.dickinson, vstinner, serhiy.storchaka, ammar2, pablogsal
2020-10-02 03:50:52corona10setmessageid: <>
2020-10-02 03:50:52corona10linkissue41902 messages
2020-10-02 03:50:51corona10create