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https://issues.apache.org/jira/browse/SPARK-15875?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15324534#comment-15324534
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Apache Spark commented on SPARK-15875:
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User 'yangw1234' has created a pull request for this issue:
https://github.com/apache/spark/pull/13601
> Avoid using Seq.length == 0 and Seq.lenth > 0. Use Seq.isEmpty and
> Seq.nonEmpty instead.
> ----------------------------------------------------------------------------------------
>
> Key: SPARK-15875
> URL: https://issues.apache.org/jira/browse/SPARK-15875
> Project: Spark
> Issue Type: Improvement
> Affects Versions: 2.0.0
> Reporter: Yang Wang
> Priority: Minor
>
> In scala, immutable.List.length is an expensive operation so we should
> avoid using Seq.length == 0 and Seq.lenth > 0 and use Seq.isEmpty and
> Seq.nonEmpty instead.
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