Greg Hogan created FLINK-3277:
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Summary: Use Value types in Gelly API
Key: FLINK-3277
URL: https://issues.apache.org/jira/browse/FLINK-3277
Project: Flink
Issue Type: Improvement
Components: Gelly
Affects Versions: 1.0.0
Reporter: Greg Hogan
This would be a breaking change so the discussion needs to happen before the
1.0.0 release.
I think it would benefit Flink to use {{Value}} types wherever possible. The
{{Graph}} functions {{inDegrees}}, {{outDegrees}}, and {{getDegrees}} each
return {{DataSet<Tuple2<K, Long>>}}. Using {{Long}} creates a new heap object
for every serialization and deserialization. The mutable {{Value}} types do not
suffer from this issue when object reuse is enabled.
I lean towards a preference for conciseness in documentation and performance in
examples and APIs.
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