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https://issues.apache.org/jira/browse/SPARK-3600?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nicholas Chammas updated SPARK-3600:
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    Component/s: Spark Core

> RDD[Double] doesn't use primitive arrays for caching
> ----------------------------------------------------
>
>                 Key: SPARK-3600
>                 URL: https://issues.apache.org/jira/browse/SPARK-3600
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core
>    Affects Versions: 1.1.0
>            Reporter: Xiangrui Meng
>
> RDD's classTag is not passed in through CacheManager. So RDD[Double] uses 
> object arrays for caching, which leads to huge overhead. However, we need to 
> send the classTag down many levels to make it work.



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