Marko A. Rodriguez created TINKERPOP-1627:
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Summary: LazyBarrierStrategy should not append an end barrier.
Key: TINKERPOP-1627
URL: https://issues.apache.org/jira/browse/TINKERPOP-1627
Project: TinkerPop
Issue Type: Improvement
Components: process
Reporter: Marko A. Rodriguez
Fix For: 3.2.4
{code}
gremlin> g.V().out().explain()
==>Traversal Explanation
==============================================================================================================
Original Traversal [GraphStep(vertex,[]),
VertexStep(OUT,vertex)]
ConnectiveStrategy [D] [GraphStep(vertex,[]),
VertexStep(OUT,vertex)]
RangeByIsCountStrategy [O] [GraphStep(vertex,[]),
VertexStep(OUT,vertex)]
RepeatUnrollStrategy [O] [GraphStep(vertex,[]),
VertexStep(OUT,vertex)]
MatchPredicateStrategy [O] [GraphStep(vertex,[]),
VertexStep(OUT,vertex)]
PathRetractionStrategy [O] [GraphStep(vertex,[]),
VertexStep(OUT,vertex)]
IncidentToAdjacentStrategy [O] [GraphStep(vertex,[]),
VertexStep(OUT,vertex)]
FilterRankingStrategy [O] [GraphStep(vertex,[]),
VertexStep(OUT,vertex)]
InlineFilterStrategy [O] [GraphStep(vertex,[]),
VertexStep(OUT,vertex)]
AdjacentToIncidentStrategy [O] [GraphStep(vertex,[]),
VertexStep(OUT,vertex)]
LazyBarrierStrategy [O] [GraphStep(vertex,[]),
VertexStep(OUT,vertex), NoOpBarrierStep(2500)]
TinkerGraphCountStrategy [P] [GraphStep(vertex,[]),
VertexStep(OUT,vertex), NoOpBarrierStep(2500)]
TinkerGraphStepStrategy [P] [TinkerGraphStep(vertex,[]),
VertexStep(OUT,vertex), NoOpBarrierStep(2500)]
ProfileStrategy [F] [TinkerGraphStep(vertex,[]),
VertexStep(OUT,vertex), NoOpBarrierStep(2500)]
StandardVerificationStrategy [V] [TinkerGraphStep(vertex,[]),
VertexStep(OUT,vertex), NoOpBarrierStep(2500)]
Final Traversal [TinkerGraphStep(vertex,[]),
VertexStep(OUT,vertex), NoOpBarrierStep(2500)]
{code}
The only time this is cool is for {{RemoteTraversal}} because you want to
barrier as much as you can to reduce over the wire costs. However,
{{RemoteStrategy}} should append an end-barrier. No other strategy should do
this --- its just wasted clock cycles.
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