$ python3 llil.py big1.txt big2.txt big3.txt > out1.txt
collect time            :    5.2 s
sort_via_cmp_to_key time:   17.7 s
sort+format time        :   17.7 s
total processing time   :   22.9 s
output time             :    3.5 s
total time              :   26.4 s

##</code><code>##

# Install pyston_lite_autoload to ~/.local/lib/python3.10/site-packages/.
$ python3 -m pip install --user pyston_lite_autoload

$ python3 llil.py big1.txt big2.txt big3.txt > out2.txt
collect time            :    4.4 s
sort_via_cmp_to_key time:   15.8 s
sort+format time        :   15.8 s
total processing time   :   20.2 s
output time             :    3.2 s
total time              :   23.4 s

##</code><code>##

$ diff llil.py llil2.py 
53c53
< def collect( data_list :list ) ->dict[ str, int ]:
---
> def collect( data_list :list ) ->dict:
87c87
< def process( cat_count :dict[ str, int ] ) ->Generator[ str, None, None ]:
---
> def process( cat_count :dict ) ->Generator:
110c110
< def sort_via_cmp_to_key( cat_count :dict[ str, int ] ) ->list[ str ]:
---
> def sort_via_cmp_to_key( cat_count :dict ) ->list:

##</code><code>##

$ ./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

##</code><code>##

$ perl dualvar.pl big1.txt big2.txt big3.txt >out4.txt
start
get properties: 6 secs
sort + output: 16 secs
total: 22 secs