"I can tell that this system consists of a JBoss Application Server with data access components and RESTful web services developed using Java. Given my prior experience with JBoss and Java, although they are great for middleware development, they’re known to be a bit slow." I always had this non founded impression that something running on the JVM would be slow ... this author also. Anyone with data to back this impr…
There are a ton of Java frameworks in the top performing benchmarks (See Lng:Jav). Whatever conclusion you've made from Java Swing applications running on top of WindowsXP machines in the early 00's are not applicable to modern web server performance.