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https://issues.apache.org/jira/browse/SPARK-41669?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17650994#comment-17650994
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Apache Spark commented on SPARK-41669:
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User 'allisonwang-db' has created a pull request for this issue:
https://github.com/apache/spark/pull/39161
> Speed up CollapseProject for wide tables
> ----------------------------------------
>
> Key: SPARK-41669
> URL: https://issues.apache.org/jira/browse/SPARK-41669
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.4.0
> Reporter: Allison Wang
> Priority: Major
>
> Currently, CollapseProject can be very slow when the project list contains a
> large number of expressions. We can speed this up by doing early pruning in
> `canCollapseExpressions`.
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