Neo4j 2.2 is the latest release from Neo Technology, aiming to be the fastest and most scalable version yet. The new page cache delivers extreme performance and scalability under highly concurrent workloads, while transactional and batch write performance have been significantly improved through enhancements such as coordination of commits between Lucene, the graph, and the transaction log. A cost-based optimizer for Cypher has also been introduced, allowing queries to determine optimal plans based on statistics about the data set. Additionally, token-based authentication is enabled by default in Neo4j 2.2 M, while some features like neo4j-import are available from the command line. The release includes various UI improvements and is intended for testing purposes only, with feedback encouraged through the Neo4j Google Group or direct email to `[email protected]`.