[GitHub] [arrow] jorgecarleitao commented on pull request #8796: [Rust] [Experiment] Vec vs current allocations

[GitBox <gi...@apache.org>]

jorgecarleitao commented on pull request #8796:
URL: https://github.com/apache/arrow/pull/8796#issuecomment-754843578


   I am closing this in favor of #9076 where the performance is fixed.
   
   The gist is that there were two reasons for the performance issues:
   
   1. we were using `std::alloc::alloc_zero`  instead of `std::alloc::alloc`
   2. we were converting everything to a byte slice instead of writing directly to the buffer
   
   That PR addresses them both and brings the `MutableBuffer` to be faster than `Vec`


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