In the following code, in the sub-routine names new(), I have used something like:

_proc => $action1,
[download]

my perception is that, in this case _proc holds a copy of the value present in $action and this is a costly method doing things, as the $self object would be very heavy to pass-on or call.
I tried to declare something like:

_proc => \$action1,
[download]

But it did not work out well for me.. :(
Please advice.

package Engine;
use strict;
use My::Module;

my $action1 = sub
{
    $pkt = shift; #where $pkt is an object of type My:Module:Object
    my $id = $pkt->get('ID');
    #........
    #do this 
    #do that...
    print $id;
}

sub new
{
    my $class = @_;
    return bless {
        _xp => My::Module->new(),
        _proc => $action1,
    }
};

sub routine
{
    my $s = shift;
    $s->{_xp}->process();
    my @arr = $s->{_xp}->getvalues("packet");
    
    map($action1->($_), @arr);
}
[download]

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