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https://issues.apache.org/jira/browse/SPARK-9903?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14694195#comment-14694195
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Apache Spark commented on SPARK-9903:
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User 'mengxr' has created a pull request for this issue:
https://github.com/apache/spark/pull/8136
> Skip local processing in PrefixSpan if there are no small prefixes
> ------------------------------------------------------------------
>
> Key: SPARK-9903
> URL: https://issues.apache.org/jira/browse/SPARK-9903
> Project: Spark
> Issue Type: Improvement
> Components: MLlib
> Affects Versions: 1.5.0
> Reporter: Xiangrui Meng
> Assignee: Xiangrui Meng
>
> There exists a chance that the prefixes keep growing to the maximum pattern
> length. Then the final local processing step becomes unnecessary.
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