Benchmark: timing 1000000 iterations of regex, unpack, xeger...


     regex:  4 wallclock secs ( 3.74 usr +  0.00 sys =  3.74 CPU) @ 267379.68/s (n=1000000)


    unpack:  8 wallclock secs ( 6.34 usr +  0.01 sys =  6.35 CPU) @ 157480.31/s (n=1000000)


     xeger:  8 wallclock secs ( 6.55 usr +  0.01 sys =  6.56 CPU) @ 152439.02/s (n=1000000)