Benchmark: timing 10000 iterations of a, b, c...
         a:  0 wallclock secs ( 0.03 usr +  0.00 sys =  0.03 CPU) @ 312500.00/s (n=10000)
            (warning: too few iterations for a reliable count)
         b:  9 wallclock secs ( 8.50 usr +  0.00 sys =  8.50 CPU) @ 1176.47/s (n=10000)
         c:  0 wallclock secs ( 0.03 usr +  0.00 sys =  0.03 CPU) @ 322580.65/s (n=10000)
            (warning: too few iterations for a reliable count)