test01.pl

#!/usr/bin/env perl

use strict;
use warnings;
use Benchmark;

my $a;
my $b;
my $c;

Benchmark::timethese(10000000, {
        'zenchi' => sub {
            ++$a;
        },
        'kouchi' => sub {
            $c++;
        },
        'equal_plus' => sub {
            $b = $b + 1;
        },
    });