Kenneth Knowles created BEAM-6503:
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Summary: PCollectionViews$SimplePCollectionView.hashCode once
again allocates memory (fix reverted, then fixed again)
Key: BEAM-6503
URL: https://issues.apache.org/jira/browse/BEAM-6503
Project: Beam
Issue Type: Improvement
Components: sdk-java-core
Affects Versions: 2.8.0
Reporter: Vojtech Janota
Assignee: Vojtech Janota
Fix For: 2.9.0
I'm currently profiling memory consumption of our Beam pipeline and have
noticed that
org.apache.beam.sdk.values.PCollectionViews$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.
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