Comment by netbioserror

If you use Nim, it's value semantics by default. Everything (and I do mean everything, all types primitive to composite) is managed by the stack, including stuff that needs to hold a heap pointer. All lifetimes are scoped. You only get ref counted types when you opt in.

It's astoundingly easy to build software with that behavior set. Even if the occasional copy is necessary, you're paying a far lower cost for it than for an interpreted language. Slice off a couple important components into stateless executables built like this, and it's clean sailing.