In the range of available Lisp implementations, CLisp not really the speed demon. on my 1.2Ghz Core Macbook: SBCL * (time (fib 38)) Evaluation t

In the range of available Lisp implementations, CLisp not really the speed demon. on my 1.2Ghz Core Macbook: SBCL * (time (fib 38)) Evaluation took: 1.640 seconds of real time 1.635822 seconds of total run time (1.631918 user, 0.003904 system) 99.76% CPU 1,968,285,540 processor cycles 0 bytes consed LispWorks CL-USER 6 > (time (fib 38)) Timing the evaluation of (FIB 38) User time = 0.567 System time = 0.002 Elapsed time = 0.554 Allocation = 136848 bytes 29 Page faults 63245986