“Neo4j 2.2 is the latest advancement in the Neo4j series. The new Cypher cost-based optimizer and the addition of a new in-memory page cache will greatly improve application read performance and scalability,” said Neo Technology’s CTO, Johan Svensson. “Improvements to the database engine, in particular Neo4j’s new fast write buffering architecture, improves write scaling quite dramatically, both for initial loading of the graph, and for highly concurrent transactional applications.”

For more information: 
Neo Claims Big Performance by Silicon Angle
Neo Tech Cranks Up Speed by Datanami
Introducing Neo4j 2.2 by SD Times
GraphDatabases Are Becoming Part of Everyday Life by Emil Eifrem