pieter martin commented on TINKERPOP-1404:

Rebased, and ran all tests.

> Path/label optimization
> -----------------------
>                 Key: TINKERPOP-1404
>                 URL: https://issues.apache.org/jira/browse/TINKERPOP-1404
>             Project: TinkerPop
>          Issue Type: Improvement
>          Components: process
>    Affects Versions: 3.2.1
>            Reporter: pieter martin
>            Assignee: pieter martin
>              Labels: performance
> Currently path queries do a lot of label collection copying. This has a 
> significant impact on performance.
> As the labels are known and set on the traverser when {{Traverser.split(r, 
> step)}} is called there is no need to call {{Traverser.addLabels}} again in 
> {{AbstractStep}}
> Also seeing as {{AbstractStep.getLabels()}} returns an {{UnmodifyableSet}} 
> the step's labels can be used directly in the traverser. There is no need to 
> make a copy of it.

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