Benchmark: timing 100000 iterations of japhy, rob_au...
     japhy:  3 wallclock secs ( 4.13 usr +  0.00 sys =  4.13 CPU) @ 24213.08/s (n=100000)
    rob_au:  4 wallclock secs ( 4.23 usr +  0.00 sys =  4.23 CPU) @ 23640.66/s (n=100000)