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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-26312) Converting converters in RDDConversions into arrays to improve their access performance
Date Mon, 10 Dec 2018 15:04:00 GMT

    [ https://issues.apache.org/jira/browse/SPARK-26312?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16714852#comment-16714852
] 

ASF GitHub Bot commented on SPARK-26312:
----------------------------------------

AmplabJenkins commented on issue #23262: [SPARK-26312][SQL]Replace RDDConversions.rowToRowRdd
with RowEncoder to improve its conversion performance
URL: https://github.com/apache/spark/pull/23262#issuecomment-445846343
 
 
   Merged build finished. Test FAILed.

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> 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
>            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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