Matt Brasier, a consultant with niche Java EE consultancy C2B2 Consulting, compares the performance of JBoss Messaging, JBoss MQ and Sun Java System Message Queue, in their out of the box configurations. This first article looks at the performance of these three implementations when sending messages to a JMS queue. The results indicate that the overhead of establishing a connection to a server, and looking up a queue is lowest in JBoss MQ, but that JBoss Messaging is the fastest at actually sending a message.