Dandandan opened a new pull request #8814:
URL: https://github.com/apache/arrow/pull/8814


   Further optimizes take string to benefit from creating a buffer directly.
   
   Interestingly, it seems it is still faster to copy a `Vec`  than to use a 
buffer for the the values. Presumably `extend_from_slice` is much slower than 
the `Vec` one.


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