> They're neither as efficient as C/Swift, nor as flexible as Lisp. My understanding is that, at the cost of a significant penalty for the (hopefully rare) exc

> They're neither as efficient as C/Swift, nor as flexible as Lisp. My understanding is that, at the cost of a significant penalty for the (hopefully rare) exceptional case, error handling with exceptions can be faster than returning values like in C in the (hopefully common) successful case.