Benchmark: timing 150000 iterations of match, silly, substr, unpack...
     match:  4 wallclock secs ( 2.78 usr +  0.01 sys =  2.79 CPU) @ 53763.44/s (n=150000)
     silly: -1 wallclock secs ( 0.26 usr + -0.10 sys =  0.16 CPU) @ 937500.00/s (n=150000)
            (warning: too few iterations for a reliable count)
    substr:  0 wallclock secs ( 0.48 usr +  0.00 sys =  0.48 CPU) @ 312500.00/s (n=150000)
    unpack:  2 wallclock secs ( 1.41 usr +  0.11 sys =  1.52 CPU) @ 98684.21/s (n=150000)