$ time ./llil4vec long* long* long* | cksum
llil4vec start
use OpenMP             ( old )    (mem-fix)    ( new )
memory consumption     89.6 GB     62.4 GB     33.0 GB
use boost sort
get properties         48.133s     32.659s     12.993s
sort properties        39.684s     39.399s     33.421s
vector reduce          87.982s     75.644s     35.568s
vector stable sort     25.990s     31.133s     21.987s
write stdout            3.707s      3.206s      3.693s
total time            205.498s    182.042s    107.664s
    count lines      970195200
    count unique     295755152
29612263 5038456270

       real time     3m57.228s   3m38.118s   1m50.092s
       user         73m27.931s  70m13.776s  45m32.094s
       sys           2m42.941s   2m29.584s   2m20.917s