At one time it was an obvious dichotomy that you would not use a scripting language for CPU bound work, but these days it is a much more blurry line. Partly because modern efficient languages are becoming ergonomic enough to work well as scripting languages while still giving you very good performance.

I actually love doing CPU bound work in Groovy which is usually described as a scripting language. But it gets converted straight to java byte code which is JIT'd and ends up as machine code. It only takes a few static typed hints here and there and it runs in the same league as C++ implementations. And it gets Java's excellent concurrency support for free.