use strict;
use warnings;

use Symbol qw(delete_package);

my @pre_require = keys %INC;

print "Modules pre-require: " . @pre_require . "\n";

require Devel::Examine::Subs;
import Devel::Examine::Subs;

my @post_require = keys %INC;

# do something with imported module immediately after
# getting the post-require %INC count

...

print "Modules post-require: " . @post_require . "\n";

my $count = @post_require - @pre_require;

print "Additional modules loaded: $count\n";

for my $file (@post_require){

    if (! grep /$file/, @pre_require){

        (my $module = $file ) =~ s/\//::/g;
        $module =~ s/\.pm$//;

        delete_package $module;
        delete $INC{$file};
    }
}

__END__
Modules pre-require: 4
Modules post-require: 138
Additional modules loaded: 134
Module count post cleanup: 4