That has been my experience, as well. It's also important to remember that Java is still in this position even after almost 20 years of development. And this i

That has been my experience, as well. It's also important to remember that Java is still in this position even after almost 20 years of development. And this is development undertaken by large companies that were or are quite well funded, and have had very talented individuals work on this technology. If they've yet to get consistent C++-level performance out of Java or the JVM, it's most likely factors inherent to those technologies that are to blame.