An example of File::Map's map_anonymous used with Storable's freeze/thaw. Might be a crappy example.

file_map__map_anonymous_example.pl

#!/usr/bin/env perl
use warnings;
use strict;
use feature ':5.10';

use Data::Dumper;
use Storable qw(freeze thaw);
use File::Map qw(map_anonymous);

my @arr = ('hi', 'there');
my $frozenarr = freeze \@arr;
my $length = length $frozenarr;
map_anonymous my $map, $length, 'shared';
substr $map, 0, $length, $frozenarr;
say Dumper thaw $map;