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https://issues.apache.org/jira/browse/FLINK-4213?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15379210#comment-15379210
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ASF GitHub Bot commented on FLINK-4213:
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Github user greghogan commented on the issue:
https://github.com/apache/flink/pull/2248
Depends how much faster we can make sorting in the `NormalizedKeySorter` :)
I'll keep working on a comparison, I've been running into the deadlock in
FLINK-4163.
> Provide CombineHint in Gelly algorithms
> ---------------------------------------
>
> Key: FLINK-4213
> URL: https://issues.apache.org/jira/browse/FLINK-4213
> Project: Flink
> Issue Type: Improvement
> Components: Gelly
> Affects Versions: 1.1.0
> Reporter: Greg Hogan
> Assignee: Greg Hogan
>
> Many graph algorithms will see better {{reduce}} performance with the
> hash-combine compared with the still default sort-combine, e.g. HITS and
> LocalClusteringCoefficient.
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