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https://issues.apache.org/jira/browse/SPARK-4505?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14219048#comment-14219048
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Apache Spark commented on SPARK-4505:
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User 'zsxwing' has created a pull request for this issue:
https://github.com/apache/spark/pull/3378
> Reduce the memory usage of CompactBuffer[T] when T is a primitive type
> ----------------------------------------------------------------------
>
> Key: SPARK-4505
> URL: https://issues.apache.org/jira/browse/SPARK-4505
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 1.1.0
> Reporter: Shixiong Zhu
> Priority: Minor
>
> If CompactBuffer has a ClassTag parameter, CompactBuffer can create primitive
> arrays for primitive types. It will reduce the memory usage for primitive
> types significantly and only pay minor performance lost.
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