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https://issues.apache.org/jira/browse/FLINK-1975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14528814#comment-14528814
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ASF GitHub Bot commented on FLINK-1975:
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GitHub user andralungu opened a pull request:
https://github.com/apache/flink/pull/653
[FLINK-1975][gelly] Graph getUndirected improvement
We were using an union of two data sets to create the undirected graph.
This could be done by simply calling a flatMap.
Thanks for the tip @fhueske! :)
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/andralungu/flink getUndirected
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/653.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #653
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commit d89addc0fd2e5e64de1667f0d701d901fa57c627
Author: andralungu <[email protected]>
Date: 2015-05-08T17:01:53Z
[FLINK-1975][gelly] Graph getUndirected improvement
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> 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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