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Posted to dev@parquet.apache.org by "Micah Kornfield (Jira)" <ji...@apache.org> on 2020/04/14 04:42:00 UTC

[jira] [Created] (PARQUET-1841) [C++] Experiment to see if using SIMD shuffle operations for DecodeSpaced improves performance

Micah Kornfield created PARQUET-1841:
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             Summary: [C++] Experiment to see if using SIMD shuffle operations for DecodeSpaced improves performance
                 Key: PARQUET-1841
                 URL: https://issues.apache.org/jira/browse/PARQUET-1841
             Project: Parquet
          Issue Type: Improvement
          Components: parquet-cpp
            Reporter: Micah Kornfield


Followup from PARQUET-1840 for current benchmarks it seems that doing removing the memset somehow either has no impact or is slightly worse.  We should investigate using SIMD operations to speed up spacing. 

 

As part of this we can see if moving the memset to only cover uninitialized values after moving all required values provides any speedup.



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