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https://issues.apache.org/jira/browse/SPARK-30564?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17018653#comment-17018653
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Maxim Gekk commented on SPARK-30564:
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[~viirya] Please, take a look at this. Maybe it can be interesting for you.
> Regression in the wide schema benchmark
> ---------------------------------------
>
> Key: SPARK-30564
> URL: https://issues.apache.org/jira/browse/SPARK-30564
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Maxim Gekk
> Priority: Minor
>
> New results of WideSchemaBenchmark generated in the PR:
> https://github.com/apache/spark/pull/27078 show regressions up to 2 times.
> Before:
> {code}
> 2500 select expressions 103 / 107 0.0
> 102962705.0 0.1X
> {code}
> https://github.com/apache/spark/pull/27078/files#diff-8d27bbf2f73a68bf0c2025f0702f7332L11
> After:
> {code}
> 2500 select expressions 211 214
> 4 0.0 210927791.0 0.0X
> {code}
> https://github.com/apache/spark/pull/27078/files#diff-8d27bbf2f73a68bf0c2025f0702f7332R11
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