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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/01/08 21:06:03 UTC

[GitHub] [arrow-rs] jorgecarleitao commented on issue #1144: Undefined behavior for GenericStringArray::from_iter_values if reported iterator upper bound is incorrect

jorgecarleitao commented on issue #1144:
URL: https://github.com/apache/arrow-rs/issues/1144#issuecomment-1008153443


   > Strangely, I don't understand the usecase of from_iter_values compared to `FromIterator`
   
   I think that `from_iter_values` leverages the invariant that there are no nulls in the iterator (`AsRef<str>`), while `FromIterator` accepts nulls / None. The two APIs are motivated by a significant performance penalty in creating the bitmap from an iterator of options (compared to the cost of an iterator of non-nullable values)
   


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