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$ NUM_THREADS=48 ./llil4emh in/biga* | cksum
llil4emh (fixed string length=12) start
...
    count lines     91395200
    count unique    79120065
2005669956 712080585

$ perl llilsql.pl --threads=48 --maps=max in/biga* | cksum
Tie::Hash::DBD SQLite database - start
...
    count lines  : 91395200
    count unique : 79120065
2005669956 712080585

// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+~~~~~~~~~
// llil4umap.cc
...

   return 0;
}