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https://issues.apache.org/jira/browse/SPARK-26312?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16715936#comment-16715936
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ASF GitHub Bot commented on SPARK-26312:
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HyukjinKwon 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-446040157
It doesn't work right now .. right? haha. I tried to merge but failed. Some
how the apache spark repo looks down (?).
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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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