Scala can be faster than Java
jto.github.io
2 threads
The title is a bit of a troll. A good Scala developer will often be able to write Scala code that outperforms similar Java code. I agree with the gist of it however, that the performance is simply comparable and therefore irrelevant to the choice between the two languages.
The compiler is much slower, though.
And the IDE support is far worse too.