$ time ./rtoa-pgatram-fixed t1.txt t1.txt t1.txt t1.txt >f.tmp
read_input_files  : 15996000 items
read file time    :    0.356 secs
roman_to_dec time :    0.460 secs
output time       :    0.124 secs
total time        :    0.941 secs

real    0m0.947s
user    0m0.875s
sys     0m0.072s

# https://perlmonks.org/?node_id=11152168 max_workers => 16
$ time perl rtoa-pgatram-mce.pl t1.txt t1.txt t1.txt t1.txt >p.tmp
rtoa pgatram start
time 0.980 secs

real    0m1.008s
user    0m14.836s
sys     0m0.075s

# https://perlmonks.org/?node_id=11152168 max_workers => 17
$ time perl rtoa-pgatram-mce.pl t1.txt t1.txt t1.txt t1.txt >p.tmp
rtoa pgatram start
time 0.912 secs

real    0m0.940s
user    0m14.802s
sys     0m0.123s

# https://perlmonks.org/?node_id=11152168 max_workers => 32
$ time perl rtoa-pgatram-mce.pl t1.txt t1.txt t1.txt t1.txt >p.tmp
rtoa pgatram start
time 0.548 secs

real    0m0.577s
user    0m15.889s
sys     0m0.231s

$ cksum f.tmp p.tmp
737201628 75552000 f.tmp
737201628 75552000 p.tmp