The slowest common lisp I'm aware of is CLISP (used in the Land of Lisp book). I don't even think it is nearly as slow as Python. In fact, even Picolisp (weird,

The slowest common lisp I'm aware of is CLISP (used in the Land of Lisp book). I don't even think it is nearly as slow as Python. In fact, even Picolisp (weird, but cool interpreted Lisp outside the Common Lisp and Scheme families) is probably faster than Python, but I've never checked.