well, that algorithm could offer the best performance in assembler or C but I doubt it could make any difference in Perl.

Actually... 

use Benchmark qw(cmpthese);

# insert your code here

sub my_mma {
  my $r = shift;

  if (@$r) {
    my ($min, $max, $tot) = ($r->[0]) x 3;
    for (@$r[1..$#$r]) {
      $min = $_ if $_ < $min;
      $max = $_ if $_ > $max;
      $tot += $_;
    }
    return ($min, $max, $tot/@$r);
  }
  return (undef, undef, undef)
}

my @nums = map {rand} 1..1000;

cmpthese(-1, { ita => sub { my @r = min_max_avg(\@nums) },
           simple => sub { my @r = my_mma(\@nums) } })

[download]
runs as... 
        Rate    ita simple
ita    222/s     --   -50%
simple 449/s   102%     --

[download]

In reply to Re: minimum, maximum and average of a list of numbers at the same time by salva
in thread minimum, maximum and average of a list of numbers at the same time by LucaPette

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