__END__
Benchmark: timing 100 iterations of faq, grepped, hash, hash_lret, prehash, prehash_lret...
       faq: 35 wallclock secs (34.09 usr +  0.02 sys = 34.11 CPU) @  2.93/s (n=100)
   grepped: 11 wallclock secs ( 9.91 usr +  0.00 sys =  9.91 CPU) @ 10.09/s (n=100)
      hash: 10 wallclock secs (10.27 usr +  0.00 sys = 10.27 CPU) @  9.74/s (n=100)
 hash_lret: 10 wallclock secs (10.23 usr +  0.00 sys = 10.23 CPU) @  9.77/s (n=100)
   prehash: 16 wallclock secs (15.13 usr +  0.00 sys = 15.13 CPU) @  6.61/s (n=100)
prehash_lret: 16 wallclock secs (15.17 usr +  0.00 sys = 15.17 CPU) @  6.59/s (n=100)
               Rate       faq prehash_lret  prehash      hash hash_lret  grepped
faq          2.93/s        --         -56%     -56%      -70%      -70%     -71%
prehash_lret 6.59/s      125%           --      -0%      -32%      -33%     -35%
prehash      6.61/s      126%           0%       --      -32%      -32%     -35%
hash         9.74/s      232%          48%      47%        --       -0%      -4%
hash_lret    9.77/s      233%          48%      48%        0%        --      -3%
grepped      10.1/s      244%          53%      53%        4%        3%       --