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https://issues.apache.org/jira/browse/SPARK-3294?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14126592#comment-14126592
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Apache Spark commented on SPARK-3294:
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User 'liancheng' has created a pull request for this issue:
https://github.com/apache/spark/pull/2327
> Avoid boxing/unboxing when handling in-memory columnar storage
> --------------------------------------------------------------
>
> Key: SPARK-3294
> URL: https://issues.apache.org/jira/browse/SPARK-3294
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 1.0.2, 1.1.0
> Reporter: Cheng Lian
> Assignee: Cheng Lian
> Priority: Critical
>
> When Spark SQL in-memory columnar storage was implemented, we tried to avoid
> boxing/unboxing costs as much as possible, but {{javap}} shows that there
> still exist code that involves boxing/unboxing on critical paths due to type
> erasure, especially methods of sub-classes of {{ColumnType}}. Should
> eliminate them whenever possible for better performance.
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