So if Perl's function calls are "too slow" (whatever that means, and nobody in this thread has suggested any relevant meaning)
~/perl$ cat func_test.pl
#!/usr/bin/perl
#sum of number between 1 and 1,000,000
$n = 1_000_000;
print addup($n, 0);
sub addup
{
return $_[1] if !$_[0];
return addup($_[0]-1,$_[1]+$_[0]);
}
~/perl$ cat loop_test.pl
#!/usr/bin/perl
#sum of number between 1 and 1,000,000
$n = 1_000_000;
$sum = 0;
$sum += $n-- while($n);
~/perl$ time ./func_test.pl
500000500000
real 0m4.025s
user 0m3.568s
sys 0m0.455s
~/perl$ time loop_test.pl
real 0m0.390s
user 0m0.388s
sys 0m0.001s
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