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https://issues.apache.org/jira/browse/SPARK-5803?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14320528#comment-14320528
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Apache Spark commented on SPARK-5803:
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User 'mengxr' has created a pull request for this issue:
https://github.com/apache/spark/pull/4594
> Use ArrayBuilder instead of ArrayBuffer for primitive types
> -----------------------------------------------------------
>
> Key: SPARK-5803
> URL: https://issues.apache.org/jira/browse/SPARK-5803
> Project: Spark
> Issue Type: Improvement
> Components: MLlib
> Affects Versions: 1.3.0
> Reporter: Xiangrui Meng
> Assignee: Xiangrui Meng
>
> ArrayBuffer is not specialized and hence it boxes primitive-typed values.
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