[jira] [Created] (TINKERPOP-1870) n^2 synchronious operation in OLAP WorkerExecutor.execute() method

["Artem Aliev (JIRA)" <ji...@apache.org>]

Artem Aliev created TINKERPOP-1870:
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             Summary: n^2 synchronious operation in OLAP WorkerExecutor.execute() method
                 Key: TINKERPOP-1870
                 URL: https://issues.apache.org/jira/browse/TINKERPOP-1870
             Project: TinkerPop
          Issue Type: Improvement
            Reporter: Artem Aliev


[https://github.com/apache/tinkerpop/blob/master/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/computer/traversal/WorkerExecutor.java#L80-L93]

This block of code iterates over all remote traverses to select one related to the current vertex and remove it. This operation is repeated for the next vertex and so one. For following example query it means n^2 operations (n is number of vertices). All of them in sync block. multi core spark executor will do this operations serial. 
{code}
g.V().emit().repeat(both().dedup()).count().next()
{code}

See jvisualvm screenshot. 



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