use XML::LibXML;
use XML::Fast;
use XML::Simple;
use XML::Bare;
use XML::Compile::Schema;
use Data::Dumper;
$XML::Simple::PREFERRED_PARSER='XML::Parser'; # Found this great tip from perlmonks 
use Benchmark qw/cmpthese/;
$doc='XML String '; 
my $schema = XML::Compile::Schema->new('./myschema.xsd');
my $reader = $schema->compile(READER => '{myns}mytype');
# I have done this outside to compile schema once but not sure if it works like that 
cmpthese timethese -10, {
	libxml  => sub { XML::LibXML->new->parse_string($doc) },
	xmlfast => sub { XML::Fast::xml2hash($doc) },
	xmlbare => sub { XML::Bare->new(text => $doc)->parse },
	xmlsimple => sub { XML::Simple->new(ForceArray => 0, KeyAttr    => {})->XMLin($doc); },
	xmlcompile =>	sub {my $hash = $reader->("$doc");},
};

##</code><code>##

             Rate xmlcompile  xmlsimple    xmlbare    xmlfast     libxml
xmlcompile 51.5/s         --       -66%       -97%       -97%       -97%
xmlsimple   149/s       190%         --       -91%       -92%       -92%
xmlbare    1651/s      3107%      1006%         --       -11%       -11%
xmlfast    1846/s      3487%      1137%        12%         --        -0%
libxml     1846/s      3487%      1137%        12%         0%         --

##</code><code>##

    use XML::Hash::LX;
    # Usage with XML::LibXML

    my $doc = XML::LibXML->new->parse_string($xml);
    my $xp  = XML::LibXML::XPathContext->new($doc);
    $xp->registerNs('rss', 'http://purl.org/rss/1.0/');

    # then process xpath
    for ($xp->findnodes('//rss:item')) {
        # and convert to hash concrete nodes
        my $item = xml2hash($_);
        print Dumper+$item
    }

##</code><code>##

Parse benchmark:

               Rate   Simple     Hash     Twig Hash::LX     Bare
    Simple   11.3/s       --      -2%     -16%     -44%     -97%
    Hash     11.6/s       2%       --     -14%     -43%     -97%
    Twig     13.5/s      19%      16%       --     -34%     -96%
    Hash::LX 20.3/s      79%      75%      51%       --     -95%
    Bare      370/s    3162%    3088%    2650%    1721%       --