Thank you for pointing me right direction. I have rewritten it:

use strict;
use warnings;
use XML::Twig;

my %bedrooms;
my @bedrooms;

my @good_division_numbers = qw( 30 31 32 35 38 );

my $xml =
  XML::Twig->new( twig_roots => { DivisionHouseRoom => \&count_bedroom
+s, } );

$xml->parsefile( 'divisionhouserooms-v3.xml');
#$xml->parsefile('test.xml');

print "=" x 40, "\n";

open my $fh, ">>", "Result.csv" or die $!;
foreach my $house_code (@bedrooms) {

    print $fh join( "\t", $house_code, $bedrooms{$house_code} ), "\n";

}
close $fh;
sleep 1;

sub count_bedrooms {

    my ( $twig, $element ) = @_;

    my $house_code = $element->first_child_text('HouseCode');
    print $house_code, "\n";

    unless ( exists $bedrooms{$house_code} ) {

        push @bedrooms, $house_code;
    }

    my ($divisions) = $element->children('Divisions');
    my @divisions = $divisions->children('Division');

    for my $division (@divisions) {

        next
          unless grep { $_ eq $division->first_child_text('DivisionNum
+ber') }
              @good_division_numbers;
        $bedrooms{$house_code} +=
          $division->first_child_text('DivisionQuantity');
    }

    $element->purge;
}

[download]

In reply to Re^2: Parsing huge XML file by Gangabass
in thread Parsing huge XML file by Gangabass

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