> One reason(or maybe the common excuse) is often "we need to have full control". That's a reason most managers can get behind. On modern machines, this excuse

> One reason(or maybe the common excuse) is often "we need to have full control". That's a reason most managers can get behind. On modern machines, this excuse is even better. Full control can easily mean 100x difference in speed. Most importantly, how do contemporary lisps deal with arrays of unboxed structs or primitives?