Github user vasia commented on the pull request:
https://github.com/apache/flink/pull/462#issuecomment-81756505
Thanks for the revision @andralungu! This makes the Gelly methods you
changed much more user-friendly.
Since, count() and collect() are just used to return a single value instead
of a DataSet with a single value for numberOfVertices/edges, isWeaklyConnected
and validate, I don't see any serious performance implications here. Also, I
doubt a user will call numberOfVertices(), isWeaklyConnected() or validate()
more than once on the same graph :-)
Thus, if no objections, I'd like to merge this tomorrow.
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