This is a preview of my experimental Actor Model grid. Initially I am releasing only the local mailbox and hash map persistence implementation. One interesting thing about this is the high-performance local mailbox implementation, namely ThreadManagedRingBufferMailbox. I am seeing in the range of 1.5 million messages per second passed through the mailbox, including ask/answer future-based messaging. (Yes, the grid supports ask/answer via futures.) For now see the tests found here to for how the various actor features work: LocalMailboxActorMessagingTest Tests take time (some 5-10 seconds) because they focus on timing large numbers of message sends. When you run the Gradle build be patient while the tests execute. There's nothing wrong when you see the test runner pause. I intend to release additional features including multi- node grid support and various key-value and event sourcing actor persistence mechanisms. That's going to require a bit more time. Vaughn Vernon Author: Implementing Domain-Driven Design http://vaughnvernon.co/?page_id=168 Twitter: @VaughnVernon