$ 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

##</code><code>##

   // Convert roman to decimal
   cstart2 = high_resolution_clock::now();
   for ( auto const& r : roman_list ) {
      // std::cout << roman_to_dec(r) << '\n';
      fast_io::io::println(roman_to_dec(r));
   }
   cend2 = high_resolution_clock::now();
   double ctaken2 = elaspe_time(cend2, cstart2);
   std::cerr << "roman_to_dec time : " << std::setw(8) << ctaken2 << " secs\n";
   
   double ctaken = elaspe_time(cend2, cstart1);
   std::cerr << "total time        : " << std::setw(8) << ctaken   << " secs\n";

##</code><code>##

$ time ./rtoa-pgatram-fixed2 t1.txt t1.txt t1.txt t1.txt >f.tmp
read_input_files  : 15996000 items
read file time    :    0.349 secs
roman_to_dec time :    0.468 secs
total time        :    0.818 secs

real    0m0.824s
user    0m0.768s
sys     0m0.056s

# https://perlmonks.org/?node_id=11152168 max_workers => 21
$ time perl rtoa-pgatram-mce.pl t1.txt t1.txt t1.txt t1.txt >p.tmp
rtoa pgatram start
time 0.770 secs

real    0m0.799s
user    0m15.147s
sys     0m0.131s

##</code><code>##

# https://perlmonks.org/?node_id=11152168 max_workers => 21
$ time perl rtoa-pgatram-mce.pl t1.txt t1.txt t1.txt t1.txt >p.tmp
rtoa pgatram start
time 0.662 secs

real    0m0.689s
user    0m13.129s
sys     0m0.132s

# 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 0.475 secs

real    0m0.502s
user    0m13.732s
sys     0m0.246s