Benchmark: timing 200000 iterations of Big, Pak, Str...
       Big: 10 wallclock secs (10.36 usr +  0.02 sys = 10.38 CPU) @ 19267.82/s (n=200000)
       Pak:  8 wallclock secs ( 9.81 usr +  0.03 sys =  9.84 CPU) @ 20325.20/s (n=200000)
       Str:  9 wallclock secs ( 8.30 usr +  0.02 sys =  8.32 CPU) @ 24038.46/s (n=200000)