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https://issues.apache.org/jira/browse/TINKERPOP-1682?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17107251#comment-17107251
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ASF GitHub Bot commented on TINKERPOP-1682:
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spmallette merged pull request #1284:
URL: https://github.com/apache/tinkerpop/pull/1284
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> by-modulator optimization strategy
> ----------------------------------
>
> Key: TINKERPOP-1682
> URL: https://issues.apache.org/jira/browse/TINKERPOP-1682
> Project: TinkerPop
> Issue Type: Improvement
> Components: process
> Affects Versions: 3.2.4
> Reporter: Daniel Kuppitz
> Assignee: Daniel Kuppitz
> Priority: Major
>
> The can be a significant difference in performance depending on whether you
> use {{by(id)}} or {{by(id())}}:
> {noformat}
> gremlin> g.V().out().in().path().by(id()).profile()
> ==>Traversal Metrics
> Step Count
> Traversers Time (ms) % Dur
> =============================================================================================================
> TinkerGraphStep(vertex,[]) 6
> 6 12.137 58.03
> VertexStep(OUT,vertex) 6
> 6 1.345 6.43
> VertexStep(IN,vertex) 12
> 12 0.861 4.12
> PathStep([[IdStep, ProfileStep]]) 12
> 12 6.570 31.42
> IdStep 36
> 36 0.452
> >TOTAL -
> - 20.916 -
> gremlin> g.V().out().in().path().by(id).profile()
> ==>Traversal Metrics
> Step Count
> Traversers Time (ms) % Dur
> =============================================================================================================
> TinkerGraphStep(vertex,[]) 6
> 6 0.876 11.54
> VertexStep(OUT,vertex) 6
> 6 0.714 9.40
> VertexStep(IN,vertex) 12
> 12 3.299 43.43
> PathStep([id]) 12
> 12 2.706 35.63
> >TOTAL -
> - 7.596 -
> {noformat}
> We should have a strategy that rewrites these simple patterns. This affects
> {{id()}}, {{label()}}, {{key()}}, {{value()}}, but also
> {{by(values("name"))}}, which can be rewritten as {{by("name")}}
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