Apache ActiveMQ 5.4.0 has an official SPECjms2007® result, thanks to the Databases and Distributed Systems Group at the Technical University Darmstadt in Germany. Complete details can be found in the official result submissions: 227 SPECjms2007@Vertical and 100 SPECjms2007@Horizontal.
If you were happy with the performance of version 5.3.0, 5.4.0 will make you smile brighter, depending on your work load it will be between 45% and 60% better.