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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2021/09/23 06:35:03 UTC

[GitHub] [arrow-datafusion] Dandandan commented on issue #1041: does datafusion master version default enable simd?

Dandandan commented on issue #1041:
URL: https://github.com/apache/arrow-datafusion/issues/1041#issuecomment-925540095


   * It could very well be your query is IO/parquet bound and simd won't reduce the execution time.
   You could try reading the table into memory to see whether that's the case.
   * the normal sum kernel uses auto vectorization, so even without `simd` flag it's using some faster kernels.
   
   For most queries I didn't see an impact in DataFusion using the `simd` feature.


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