$ perl llilkch.pl big{1,2,3}.txt | cksum
Kyoto Cabinet hash database - start
fixed string length=12, threads=8, maps=32
get properties   :     3.348 secs
pack properties  :     1.187 secs
sort packed data :     0.960 secs
write stdout     :     0.775 secs
total time       :     6.273 secs
    count lines  : 10545600
    count unique : 10367603
2956888413 93308427

$ perl llilkch.pl --threads=16 --maps=64 big{1,2,3}.txt | cksum
Kyoto Cabinet hash database - start
fixed string length=12, threads=16, maps=64
get properties   :     1.925 secs
pack properties  :     0.723 secs
sort packed data :     0.965 secs
write stdout     :     0.387 secs
total time       :     4.005 secs
    count lines  : 10545600
    count unique : 10367603
2956888413 93308427

$ perl llilkch.pl --threads=24 --maps=64 big{1,2,3}.txt | cksum
Kyoto Cabinet hash database - start
fixed string length=12, threads=24, maps=64
get properties   :     1.420 secs
pack properties  :     0.538 secs
sort packed data :     0.975 secs
write stdout     :     0.286 secs
total time       :     3.225 secs
    count lines  : 10545600
    count unique : 10367603
2956888413 93308427

$ perl llilkch.pl --threads=48 --maps=max big{1,2,3}.txt | cksum
Kyoto Cabinet hash database - start
fixed string length=12, threads=48, maps=128
get properties   :     0.908 secs
pack properties  :     0.372 secs
sort packed data :     0.969 secs
write stdout     :     0.205 secs
total time       :     2.462 secs
    count lines  : 10545600
    count unique : 10367603
2956888413 93308427