$ time ./llil3vec_11149482_no6 big1.txt big2.txt big3.txt >vec6.tmp
llil3vec start
get_properties      CPU time : 3.19387 secs
emplace set sort    CPU time : 0.996694 secs
write stdout        CPU time : 1.32918 secs
total               CPU time : 5.5198 secs
total        wall clock time : 6 secs

real    0m6.088s
user    0m5.294s
sys     0m0.701s

$ time ./llil3vec_11149482_no6_omp big1.txt big2.txt big3.txt >vec6.tmp
llil3vec start
get_properties      CPU time : 3.99891 secs
emplace set sort    CPU time : 1.13424 secs
write stdout        CPU time : 1.41112 secs
total               CPU time : 6.54723 secs
total        wall clock time : 4 secs

real    0m4.952s
user    0m6.207s
sys     0m0.842s