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https://issues.apache.org/jira/browse/SPARK-10585?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Davies Liu resolved SPARK-10585.
--------------------------------
Resolution: Fixed
Fix Version/s: 1.6.0
Issue resolved by pull request 8747
[https://github.com/apache/spark/pull/8747]
> only copy data once when generate unsafe projection
> ---------------------------------------------------
>
> Key: SPARK-10585
> URL: https://issues.apache.org/jira/browse/SPARK-10585
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Wenchen Fan
> Fix For: 1.6.0
>
>
> When we have nested struct, array or map, we will create a byte buffer for
> each of them, and copy data to the buffer first, then copy them to the final
> row buffer. We can save the first copy and directly copy data to final row
> buffer.
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