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https://issues.apache.org/jira/browse/SPARK-35361?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17342792#comment-17342792
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Apache Spark commented on SPARK-35361:
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User 'sunchao' has created a pull request for this issue:
https://github.com/apache/spark/pull/32507
> Improve performance for ApplyFunctionExpression
> -----------------------------------------------
>
> Key: SPARK-35361
> URL: https://issues.apache.org/jira/browse/SPARK-35361
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: Chao Sun
> Priority: Minor
>
> When the `ScalarFunction` itself is trivial, `ApplyFunctionExpression` could
> incur significant runtime cost with `zipWithIndex` call. This proposes to
> move the call outside the loop over each input row.
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