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https://issues.apache.org/jira/browse/SPARK-28113?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun updated SPARK-28113:
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Affects Version/s: (was: 3.0.0)
3.1.0
> Lazy val performance pitfall on Spark LogicalPlan's output method
> -----------------------------------------------------------------
>
> Key: SPARK-28113
> URL: https://issues.apache.org/jira/browse/SPARK-28113
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.1.0
> Reporter: Yesheng Ma
> Priority: Major
>
> The original {{output}} implementation in a few QueryPlan sub-classes are
> methods, which means unnecessary re-computation can happen at times. This PR
> resolves this problem by making these method lazy vals.
> We benchmarked this optimization on TPC-DS. In the benchmark, we warmed up
> the queries 5 iterations and then took the average of 5 runs. Results showed
> that this micro-optimization can improve the end-to-end planning time by 9.3%.
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