to me Class::MethodMaker looks like an overhead. the really easiest and most efficient way to create a class and instantiate it is by using and inheriting from Exporter;

package MyClass;
use strict;

use vars qw/@ISA/;
use Exporter;
@ISA = qw/Exporter/;

sub new {
   my $class = shift;
   my $self = {};
   bless $self, $class;
}
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and later, in a script:

#!/usr/bin/perl -w

use strict;
use MyClass;

my ($d1, $d2) = (MyClass->new, MyClass->new);
...
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for more information take a look at

perldoc perlbot
perldoc perltoot
perldoc -f bless
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