Select Code to Download

#!/usr/bin/perl
use warnings;
...
    }
    return $lcs;
}

Benchmark: running buk, index, regex for at least 5 CPU seconds...
       buk:  6 wallclock secs ( 5.31 usr +  0.01 sys =  5.32 CPU) @ 19
+73.50/s (n=10499)
...
regex  931/s    --  -53%  -69%
buk   1973/s  112%    --  -35%
index 3024/s  225%   53%    --