# perl 5.10.0:
timethis 10:  0 wallclock secs ( 0.33 usr +  0.00 sys =  0.33 CPU) @ 30.30/s (n=10)
            (warning: too few iterations for a reliable count)
# perl 5.8.8:
timethis 10: 79 wallclock secs (78.92 usr +  0.04 sys = 78.96 CPU) @  0.13/s (n=10)