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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2015/05/01 12:09:06 UTC

[jira] [Assigned] (SPARK-7251) Perform sequential scan when iterating over entries in BytesToBytesMap

     [ https://issues.apache.org/jira/browse/SPARK-7251?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-7251:
-----------------------------------

    Assignee: Apache Spark

> Perform sequential scan when iterating over entries in BytesToBytesMap
> ----------------------------------------------------------------------
>
>                 Key: SPARK-7251
>                 URL: https://issues.apache.org/jira/browse/SPARK-7251
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core
>            Reporter: Josh Rosen
>            Assignee: Apache Spark
>
> In BytesToBytesMap, {{iterator()}} iterates in order of set bits in the bitmap, but it would be faster to iterate directly through the data pages, since this will result in less random memory access.



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