The handler toolic describes is capable of working with large files.
Alternatively, you could use xpath: 
#!/usr/bin/perl

use strict;
use warnings;
use XML::Twig;
use v5.10;

my $twig = XML::Twig->new();
   $twig->parsefile( 'CC.xml');

my $looking_for_day = 'Tuesday';

foreach my $node ($twig->get_xpath('//Day[@day_of_week="' . $looking_f
+or_day . '"]/Times/Time')) {
    say $node->att('start-time');
}

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In reply to Re: Extracting XML data from a tree by Neighbour
in thread Extracting XML data from a tree by perlvroom

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