Those numbers do look a little funny, 22 seconds seems way to high for Ruby 1.8, on my macbook 2.6Ghz it's around 3.2 secs.
Out of curiosity, what were you doing that made your SBCL numbers so high? I've got 1.8.6 (running natively on OSX) clocked at 1.3 seconds and SBCL (linux on VMWare) at 78 ms.
(These times are with the random number generation removed, with them the SBCL time jumps to 90ms and 1.8.6 jumps to 4 seconds).
Out of curiosity, what were you doing that made your SBCL numbers so high? I've got 1.8.6 (running natively on OSX) clocked at 1.3 seconds and SBCL (linux on VMWare) at 78 ms.
(These times are with the random number generation removed, with them the SBCL time jumps to 90ms and 1.8.6 jumps to 4 seconds).