Yeah, my point was it's OK to make variadic functions have a little extra logic and in some cases potentially be slower than the ix86 equivalent, because regula

Yeah, my point was it's OK to make variadic functions have a little extra logic and in some cases potentially be slower than the ix86 equivalent, because regular functions are definitely sped-up and those are much more common. On the subject of passing structs by value: it really comes down to whether you plan on copying the struct anyway or not, doesn't it?