[GitHub] [arrow-datafusion] tustvold commented on issue #1652: ARROW2: Performance benchmark

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tustvold commented on issue #1652:
URL: https://github.com/apache/arrow-datafusion/issues/1652#issuecomment-1019913842


   Big :+1: to this, getting some concrete numbers would be really nice.
   
   FWIW some ideas for whoever picks this up that I at least would be very interested in:
   
   * Performance against current arrow-rs master, a number of non-trivial performance improvements have landed in the last month, with more currently in progress
   
   * Performance of floating point aggregates, I seem to remember all the TPCH queries testing such fail to run correctly, but I could be mistaken
   
   * Performance of dictionary arrays, there is a substantial amount of work completed and in-flight to improve this situation as it has historically been poor (and still is WIP)- https://github.com/apache/arrow-datafusion/issues/1610, https://github.com/apache/arrow-datafusion/issues/1474, https://github.com/apache/arrow-rs/pull/1180, etc...
   
   * Performance on parquet files with reasonable row group sizes, the OOM would suggest they aren't teeny but wanted to clarify - there is currently a limitation of arrow-rs's parquet writer that makes it produce impractically small row groups - https://github.com/apache/arrow-rs/issues/1211
   
   * Performance of specific operators, e.g. FilterExec or SortPreservingMerge or ParquetExec, I'd basically be interested in where the performance gains are, and where we might gain or lose performance a potential switch. Perhaps some execution plan metrics, or a perf dump or something :thinking:
   


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