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From "Michael Armbrust (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-3294) Avoid boxing/unboxing when handling in-memory columnar storage
Date Fri, 29 Aug 2014 04:50:08 GMT

     [ https://issues.apache.org/jira/browse/SPARK-3294?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Michael Armbrust updated SPARK-3294:
------------------------------------

    Assignee: Cheng Lian

> Avoid boxing/unboxing when handling in-memory columnar storage
> --------------------------------------------------------------
>
>                 Key: SPARK-3294
>                 URL: https://issues.apache.org/jira/browse/SPARK-3294
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 1.0.2, 1.1.0
>            Reporter: Cheng Lian
>            Assignee: Cheng Lian
>            Priority: Critical
>
> When Spark SQL in-memory columnar storage was implemented, we tried to avoid boxing/unboxing
costs as much as possible, but {{javap}} shows that there still exist code that involves boxing/unboxing
on critical paths due to type erasure, especially methods of sub-classes of {{ColumnType}}.
Should eliminate them whenever possible for better performance.



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