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https://issues.apache.org/jira/browse/SPARK-17490?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15479418#comment-15479418
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Apache Spark commented on SPARK-17490:
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User 'kiszk' has created a pull request for this issue:
https://github.com/apache/spark/pull/15044
> Optimize SerializeFromObject for primitive array
> ------------------------------------------------
>
> Key: SPARK-17490
> URL: https://issues.apache.org/jira/browse/SPARK-17490
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.0.0
> Reporter: Kazuaki Ishizaki
>
> In logical plan, {{SerializeFromObject}} for an array always use
> {{GenericArrayData}} as a destination. {{UnsafeArrayData}} could be used for
> an primitive array. This is a simple approach to solve issues that are
> addressed by SPARK-16043.
> Here is a motivating example.
> {code}
> sparkContext.parallelize(Seq(Array(1)), 1).toDS.map(e => e).show
> {code}
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