# https://perlmonks.org/?node_id=11152186
$ time ./rtoa-pgatram-allinone2 t1.txt t1.txt t1.txt t1.txt | cksum
do_it_all time    :    0.490 secs  fast_io memory mapping
737201628 75552000

real    0m0.492s
user    0m0.471s
sys     0m0.037s

# https://perlmonks.org/?node_id=11152168 max_workers => 32
$ time perl rtoa-pgatram-mce.pl t1.txt t1.txt t1.txt t1.txt | cksum
rtoa pgatram start
time 0.480 secs
737201628 75552000

real    0m0.504s
user    0m13.887s
sys     0m0.231s

# https://perlmonks.org/?node_id=11152168 max_workers => 64
$ time perl rtoa-pgatram-mce.pl t1.txt t1.txt t1.txt t1.txt | cksum
rtoa pgatram start
time 0.425 secs
737201628 75552000

real    0m0.449s
user    0m21.884s
sys     0m0.592s