$ NUM_THREADS=6 LD_LIBRARY_PATH=/usr/local/lib ./llil4judy big1.txt big2.txt big3.txt >f.tmp
llil4judy (fixed string length=6) start
use OpenMP
use boost sort
get properties         0.682 secs
finish merging         2.338 secs
vector stable sort     0.262 secs
write stdout           0.526 secs
total time             3.810 secs
$ cmp f.tmp big-3vec.tmp