Slow CRUD @RelationshipEntity in SDN 4.0

Question

I try to save properties on a RelathionEntity

As i read here

How to CRUD @RelationshipEntity in SDN 4.0

this is possible saving one of the start/end node, but i notice that this is extreme slow instead of saving a node with deth 0 (saving a node with depth 0 takes about 2ms, saving a node with depth 1 takes about 1000ms). The node that I'm trying to save has only 4 relationships

I've tried also session.save(...) (org.neo4j.ogm.session.Session) on an object annotated as @RelationshipEntity, but it does nothing

I use spring-data-neo4j 4.0.0.RELEASE and Neo4j 2.2.5

Follow the code for entities and relationships:

@NodeEntity
public class EntityA{
   @GraphId
   private Long             nodeId;
   private String               propertyA;
   @Relationship(type = "RelationshipAB", direction = Relationship.OUTGOING)
   private Set<RelationshipAB>  entitiesB   = new HashSet<RelationshipAB>();
}

@NodeEntity
public class EntityB{
   @GraphId
   private Long nodeId;
   private String   propertyB;
}

@RelationshipEntity(type = "RelationshipAB")
public class RelationshipAB{
   @GraphId
   private Long nodeId;
   @StartNode
   private EntityA  entityA;
   @EndNode
   private EntityB  entityB;
   @Property
   private String   propertyAB;
 }

Follow a simple test case for checking the performace:

    EntityA entityA = new EntityA();
    entityA.setPropertyA("propertyA");
    entityARepository.save(entityA);

    for (int i = 0; i < 100; i++) {
        EntityB entityB = new EntityB();
        entityB.setPropertyB("propertyB-" + i);
        entityBRepository.save(entityB);

        RelationshipAB rel = new RelationshipAB();
        rel.setEntityA(entityA);
        rel.setEntityB(entityB);
        rel.setPropertyAB("propertyAB-" + i);

        entityA.getEntitiesB().add(rel);

        Date startDate = new Date();
        entityARepository.save(entityA, 1);
        Date endDate = new Date();
        System.out.println("Time for adding " + (i + 1) + " node: " + (endDate.getTime() - startDate.getTime()) + " ms");
    }

    Iterator<RelationshipAB> iter = entityA.getEntitiesB().iterator();
    for (int i = 0; i < 10; i++) {
        iter.next();
    }
    iter.next().setPropertyAB("newProperty1");
    Date startDate = new Date();
    entityARepository.save(entityA, 1);
    Date endData = new Date();
    System.out.println("Time for cahnge the first relationship property: " + (endData.getTime() - startDate.getTime()) + " ms");

    for (int i = 0; i < 20; i++) {
        iter.next();
    }
    iter.next().setPropertyAB("newProperty2");
    startDate = new Date();
    entityARepository.save(entityA, 1);
    endData = new Date();
    System.out.println("Time for cahnge the second relationship property: " + (endData.getTime() - startDate.getTime()) + " ms");

    for (int i = 0; i < 10; i++) {
        iter.next();
    }
    iter.next().setPropertyAB("newProperty3");
    startDate = new Date();
    entityARepository.save(entityA, 1);
    endData = new Date();
    System.out.println("Time for cahnge the third relationship property: " + (endData.getTime() - startDate.getTime()) + " ms");

The adding nodes takes less than 100ms, the first update (the save after setPropertyAB("newProperty1")) takes about 1s, the next update takes about 4s and the last one about 7s

Answer 1

As suggested from Michael Hunger, this performance problems are fixed in version:

<dependency>
    <groupId>org.neo4j</groupId>
    <artifactId>neo4j-ogm</artifactId>
    <version>1.1.3-SNAPSHOT</version>
</dependency>

Until 1.1.3 is released, you'll need to add a dependency to the snapshots repository:

<repository>
    <id>neo4j-snapshots</id>
    <url>http://m2.neo4j.org/content/repositories/snapshots</url>
    <snapshots>
        <enabled>true</enabled>
    </snapshots>
</repository>

We tested it with our solution.