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https://issues.apache.org/jira/browse/TINKERPOP-1992?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16560032#comment-16560032
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stephen mallette commented on TINKERPOP-1992:
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Identified the problem, but not sure how to fix it - note that in {{GroupStep}}
we grab the first barrier:
https://github.com/apache/tinkerpop/blob/9ab5efa6772bb831238f6c9a4e46fc925a45ddaa/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/GroupStep.java#L73
and we iterate that:
https://github.com/apache/tinkerpop/blob/9ab5efa6772bb831238f6c9a4e46fc925a45ddaa/gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/GroupStep.java#L89
and therefore if a {{ProfileStep}} is present then we don't start its timer. as
a result, when the traversal timers get normalized you end up with a negative
value.
> count has negative time in profile
> ----------------------------------
>
> Key: TINKERPOP-1992
> URL: https://issues.apache.org/jira/browse/TINKERPOP-1992
> Project: TinkerPop
> Issue Type: Bug
> Components: process
> Affects Versions: 3.3.3, 3.2.9
> Reporter: Robert Dale
> Priority: Minor
>
> {noformat}
> gremlin> g.V().group().by().by(bothE().count()).profile()
> ==>Traversal Metrics
> Step Count
> Traversers Time (ms) % Dur
> =============================================================================================================
> TinkerGraphStep(vertex,[]) 19172
> 19172 4.957 5.24
> GroupStep(identity,[VertexStep(BOTH,edge), Prof... 1
> 1 89.696 94.76
> VertexStep(BOTH,edge) 84812
> 84812 50.723
> CountGlobalStep 19172
> 19172 -39.649
> >TOTAL -
> - 94.654 -
> {noformat}
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