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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2018/12/08 07:39:00 UTC

[jira] [Assigned] (SPARK-26312) Converting converters in RDDConversions into arrays to improve their access performance

     [ https://issues.apache.org/jira/browse/SPARK-26312?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-26312:
------------------------------------

    Assignee: Apache Spark

> Converting converters in RDDConversions into arrays to improve their access performance
> ---------------------------------------------------------------------------------------
>
>                 Key: SPARK-26312
>                 URL: https://issues.apache.org/jira/browse/SPARK-26312
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.4.0
>            Reporter: eaton
>            Assignee: Apache Spark
>            Priority: Major
>
> `RDDConversions` would get disproportionately slower as the number of columns in the query increased.
> This PR converts the `converters` in `RDDConversions` into arrays to improve their access performance, the type of `converters` before is `scala.collection.immutable.::` which is a subtype of list.



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