I disagree. Ruby was slow (still is), but that trend is changing. More and more effort is put into speeding up and modernising Ruby in general. It might have

I disagree. Ruby was slow (still is), but that trend is changing. More and more effort is put into speeding up and modernising Ruby in general. It might have only begun to mature, but it's definitely getting a there. Rubinius is a lot faster than MRI and has proper multithreading support. There is also JRuby, which runs on JVM.