much, much, much less than Python. CL compilers (looking at SBCL) get you many type checks, at compile time, instantly (you compile the function at point), or y

much, much, much less than Python. CL compilers (looking at SBCL) get you many type checks, at compile time, instantly (you compile the function at point), or you can send computation to compile time yourself, and the OO is different, etc.