Benchmark: running faster, faster2, slower, slower2, each for at least 5 CPU seconds...
    faster:  4 wallclock secs ( 5.25 usr +  0.00 sys =  5.25 CPU) @ 103837.90/s (n=545149)
   faster2:  6 wallclock secs ( 5.24 usr +  0.00 sys =  5.24 CPU) @ 103939.83/s (n=544125)
    slower:  5 wallclock secs ( 5.25 usr +  0.00 sys =  5.25 CPU) @ 133356.57/s (n=700122)
   slower2:  5 wallclock secs ( 5.28 usr +  0.00 sys =  5.28 CPU) @ 132805.94/s (n=701481)
            Rate  faster faster2 slower2  slower
faster  103838/s      --     -0%    -22%    -22%
faster2 103940/s      0%      --    -22%    -22%
slower2 132806/s     28%     28%      --     -0%
slower  133357/s     28%     28%      0%      --