In general, the Java static compiler generates pretty poor-performing bytecode, no matter how much useful info you give it. This is by design, and relies on Hot

In general, the Java static compiler generates pretty poor-performing bytecode, no matter how much useful info you give it. This is by design, and relies on HotSpot to provide the necessary optimisations at runtime. I'm no expert but I would assume that the Scala compiler is quite similar. Not much point in generating highly optimised bytecode when HotSpot will do the job for you.