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https://issues.apache.org/jira/browse/SPARK-10990?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14947838#comment-14947838
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Apache Spark commented on SPARK-10990:
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User 'davies' has created a pull request for this issue:
https://github.com/apache/spark/pull/9016
> Avoid the serialization multiple times during unrolling of complex types
> ------------------------------------------------------------------------
>
> Key: SPARK-10990
> URL: https://issues.apache.org/jira/browse/SPARK-10990
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Davies Liu
> Assignee: Davies Liu
>
> The serialize() will be called by actualSize() and append(), we should use
> UnsafeProjection before unrolling,
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