Maja Kabiljo created GIRAPH-414:
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Summary: Create BinaryCombiner ands specialized message store for
it
Key: GIRAPH-414
URL: https://issues.apache.org/jira/browse/GIRAPH-414
Project: Giraph
Issue Type: Improvement
Reporter: Maja Kabiljo
Assignee: Maja Kabiljo
Current combiner interface is very general, but also doesn't provide the best
performance. All the combiners we currently have are binary combiners, i.e.
they can combine two messages into one. Having a lists around this simple
concept makes it slower and requires more object creations.
Adding BinaryCombiner, and a specialized message store which will be used with
it. This message store has only one message per vertex instead of having a
collection per vertex.
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