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https://issues.apache.org/jira/browse/HDFS-3976?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Wang updated HDFS-3976:
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Attachment: hdfs-3976-1.patch
Small patch. TestMutableMetrics still passes, so I think correctness is fine.
I can run a real performance test if people want to see that too, but it seems
strictly better to me.
> SampleQuantiles#query is O(N^2) instead of O(N)
> -----------------------------------------------
>
> Key: HDFS-3976
> URL: https://issues.apache.org/jira/browse/HDFS-3976
> Project: Hadoop HDFS
> Issue Type: Improvement
> Affects Versions: 2.0.3-alpha
> Reporter: Andrew Wang
> Assignee: Andrew Wang
> Priority: Minor
> Attachments: hdfs-3976-1.patch
>
>
> SampleQuantiles#query() does O(N) calls LinkedList#get() in a loop, rather
> than using an iterator. This makes query O(N^2), rather than O(N).
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