How’d they solve it? They work through the arguments array backwards
so they don’t really need to know how many arguments are in the stack,
but they can assume that there’s at least the enough arguments to
satisfy the parameter count - even if the arguments are
This allows for cutting up the formal parameters and the extra variadic
arguments to pass them to the callee frame in a way that doesn’t require
extra lookups or an extra frame that will calculate it all.
No more overhead! Super fast!