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https://issues.apache.org/jira/browse/FLINK-1975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14545646#comment-14545646
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ASF GitHub Bot commented on FLINK-1975:
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Github user asfgit closed the pull request at:
https://github.com/apache/flink/pull/653
> Graph getUndirected improvement
> --------------------------------
>
> Key: FLINK-1975
> URL: https://issues.apache.org/jira/browse/FLINK-1975
> Project: Flink
> Issue Type: Improvement
> Components: Gelly
> Affects Versions: 0.9
> Reporter: Andra Lungu
> Assignee: Andra Lungu
> Priority: Minor
> Labels: easyfix
>
> The current getUndirected method uses a union and a map to add the reverse
> edges to the graph. This could be done by simply using a flatMap that adds
> the edge and its reversed version - a flatMap is less expensive than a union
> followed by a map.
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