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https://issues.apache.org/jira/browse/SPARK-33689?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17245158#comment-17245158
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Apache Spark commented on SPARK-33689:
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User 'Koraseg' has created a pull request for this issue:
https://github.com/apache/spark/pull/30644
> ArrayData specialization to enable RowEncoder primitive arrays support
> ----------------------------------------------------------------------
>
> Key: SPARK-33689
> URL: https://issues.apache.org/jira/browse/SPARK-33689
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.0.1
> Reporter: Artem Kupchinskiy
> Priority: Major
>
> Currently, even non-nullable array fields are represented as
> WrappedArray.ofRef in external rows. It leads to memory footprint, as well as
> unnecessary cycles in boxing/unboxing operations. Ideally, if arrays are
> non-nullable and contain primitive values, they should be represented as
> specialized less-overhead versions of WrappedArray.
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