$ ./pyston_2.3.5/bin/pyston3 llil2.py big1.txt big2.txt big3.txt > out3.txt
collect time            :    3.7 s
sort_via_cmp_to_key time:   12.2 s
sort+format time        :   12.2 s
total processing time   :   15.9 s
output time             :    3.0 s
total time              :   18.8 s