Benchmark: timing 100000 iterations of a, b, c...
         a:  7 wallclock secs ( 5.92 usr +  0.00 sys =  5.92 CPU) @ 16891.89/s (
n=100000)
         b:  5 wallclock secs ( 4.57 usr +  0.00 sys =  4.57 CPU) @ 21881.84/s (
n=100000)
         c:  0 wallclock secs ( 0.62 usr +  0.00 sys =  0.62 CPU) @ 161290.32/s
(n=100000)