That's how I always seen it described. Not high performance as in low level signal processing, but as in server software. I would think of it like an alternativ

That's how I always seen it described. Not high performance as in low level signal processing, but as in server software. I would think of it like an alternative to Go (and Erlang), but with more focus on performance, safety and more functional and ruby-like rather than C-like. What they are sacrificing is simplicity, and perhaps ease-of-reasoning.