$ perl llilsql.pl --threads=48 --maps=max \
  in/biga* in/biga* in/biga* in/biga* in/biga* in/biga* \
  in/biga* in/biga* in/biga* in/biga* in/biga* in/biga* \
| cksum
Tie::Hash::DBD SQLite database - start
fixed string length=12, threads=48, maps=128
get properties   :   321.814 secs   3.408 mil QPS
pack properties  :     1.621 secs
sort packed data :     6.873 secs
write stdout     :     1.651 secs
total time       :   331.978 secs
    count lines  : 1096742400
    count unique : 79120065
3625599930 791200650

$ perl llildbf.pl --threads=48 --maps=max \
  in/biga* in/biga* in/biga* in/biga* in/biga* in/biga* \
  in/biga* in/biga* in/biga* in/biga* in/biga* in/biga* \
| cksum
DB_File B-tree database - start
fixed string length=12, threads=48, maps=128
get properties   :   314.637 secs   3.486 mil QPS
pack properties  :     2.074 secs
sort packed data :     6.690 secs
write stdout     :     1.677 secs
total time       :   325.097 secs
    count lines  : 1096742400
    count unique : 79120065
3625599930 791200650

$ perl lliltch.pl --threads=48 --maps=max \
  in/biga* in/biga* in/biga* in/biga* in/biga* in/biga* \
  in/biga* in/biga* in/biga* in/biga* in/biga* in/biga* \
| cksum
Tokyo Cabinet hash database - start
fixed string length=12, threads=48, maps=128
get properties   :   120.170 secs   9.127 mil QPS
pack properties  :     3.312 secs
sort packed data :     6.872 secs
write stdout     :     1.712 secs
total time       :   132.086 secs
    count lines  : 1096742400
    count unique : 79120065
3625599930 791200650

$ perl llilkch.pl --threads=48 --maps=max \
  in/biga* in/biga* in/biga* in/biga* in/biga* in/biga* \
  in/biga* in/biga* in/biga* in/biga* in/biga* in/biga* \
| cksum
Kyoto Cabinet hash database - start
fixed string length=12, threads=48, maps=128
get properties   :   139.692 secs   7.851 mil QPS
pack properties  :     2.476 secs
sort packed data :     6.974 secs
write stdout     :     1.635 secs
total time       :   150.795 secs
    count lines  : 1096742400
    count unique : 79120065
3625599930 791200650