[GitHub] [beam] kennknowles opened a new issue, #19243: PCollectionViews$SimplePCollectionView.hashCode once again allocates memory (fix reverted, then fixed again)

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

kennknowles opened a new issue, #19243:
URL: https://github.com/apache/beam/issues/19243

   I'm currently profiling memory consumption of our Beam pipeline and have noticed that
   
       org.apache.beam.sdk.values.PCollectionViews$SimplePCollectionView.hashCode()
   
   makes noticeable heap allocations. The implementation is:
   
       return Objects.hash(tag);
   
   That itself translates to:
   
       return Arrays.hashCode(values);
   
   Which performs implicit array creation in order to call:
   
       public static int Arrays.hashCode(Object a[]);
   
   Instead of the helper call, doing simple:
   
       tag.hashCode();
   
   Seems more appropriate.
   
   Imported from Jira [BEAM-6503](https://issues.apache.org/jira/browse/BEAM-6503). Original Jira may contain additional context.
   Reported by: janotav.


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