Neo4j – 关系方向是否影响密码性能？

我一直很好奇的东西.

(假设你可以神奇地翻转neo4j中的关系方向)

哪个会更快？

START a=node(345)
MATCH (a)<-[:foo]-(b)<-[:bar]-(c)
RETURN c

要么

START a=node(345)
MATCH (a)-[:foo]->(b)-[:bar]->(c)
RETURN c

或者无关紧要,在引擎盖下,你可以向任何一个方向移动？

在javadocs中找到答案( http://api.neo4j.org/current/org/neo4j/graphdb/Relationship.html)

Even though all relationships have a direction they are equally well traversed in both directions so there’s no need to create duplicate relationships in the opposite direction (with regard to traversal or performance).

这回答了这一点.