Perhaps not that that much. Swift’s arrays are refcounted. And you can’t store an array on the stack. Classes are refcounted too, but you could avoid them. It a

Perhaps not that that much. Swift’s arrays are refcounted. And you can’t store an array on the stack. Classes are refcounted too, but you could avoid them. It also has a bit of a runtime, and you don’t know when it will take locks or allocate (though there is work to tag functions so they can’t do either).