Technically Common Lisp is optionally typed. You can add static typing if you feel like it, and it can give you a significant performance boost when you do. Fo

Technically Common Lisp is optionally typed. You can add static typing if you feel like it, and it can give you a significant performance boost when you do. Fortunately, I don't have to bother with it most of the time since the amount of code that is time-critical enough for it to matter is very small.