mod_php (first benchmark, but on a real app not synthetic). It’s GPL’ed. This is more than a little surprising. I’ve been campaigning heavily in the Java community at large and here at Sun specifically to make dynamic languages on the JVM a major priority, but I’d never really focused on PHP, because I didn’t know anyone was even working on the problem. (Well, to be honest, also because PHP has always made me nervous.) This changes the “On Beyond Java” picture. [Late addition: last word to Steve Jenson.]