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https://issues.apache.org/jira/browse/SPARK-1321?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Reynold Xin resolved SPARK-1321.
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Resolution: Fixed
> Use Guava's top k implementation rather than our custom priority queue
> ----------------------------------------------------------------------
>
> Key: SPARK-1321
> URL: https://issues.apache.org/jira/browse/SPARK-1321
> Project: Apache Spark
> Issue Type: Improvement
> Reporter: Reynold Xin
> Assignee: Reynold Xin
> Priority: Critical
> Fix For: 1.0.0
>
>
> Guava's top k implementation (in Ordering) is much faster than the
> BoundedPriorityQueue implementation for roughly sorted input (10 - 20X
> faster), and still faster for purely random input (2 - 5X).
> We should switch to using that in Spark.
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