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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2020/11/29 11:37:07 UTC

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

Dandandan commented on pull request #8796:
URL: https://github.com/apache/arrow/pull/8796#issuecomment-735379511


   I did some profiling with Valgrind yesterday. I don't have a very good knowledge currently of the workings `memory` but there I saw as well that some of the lines in the code related to `MutableBuffer::extend_from_slice` in terms of instruction cycles as they are called a lot in the code / kernels. I think a few "micro optimizations" are possible there. 
   
   It makes sense to me that switching to `Vec<u8>` benefits from it being optimized/benchmarked already extremely well.


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