Have we made a fundamental error somewhere...

I think yes. Your libxml_output() re-structures the passed $xml, then stringifies, the xmlsimple_output() just stringifies the passed $xml, generated by XMLin() beforehand. The subroutines are not comparable.

Just measuring the performance of stringification ...

#!/usr/bin/perl -w
use strict;
use XML::Simple;
use XML::LibXML;
use Benchmark qw(cmpthese);

my $file = shift or die "usage: $0 xmlfile\n";

my $xml = XMLin( $file);
my $dom = XML::LibXML->load_xml(location => $file);

cmpthese ( -1, {
        simple => sub { XMLout($xml) },
        libxml => sub { $dom->toString() },
    }
);
__END__
         Rate simple libxml
simple 29.4/s     --   -96%
libxml  658/s  2141%     --

[download]

... gives a different picture. Are you working internally with $xml or $dom ?

perl -le'print map{pack c,($-++?1:13)+ord}split//,ESEL'

In reply to Re: Replacing XML::Simple XMLout with Lib::XML by shmem
in thread Replacing XML::Simple XMLout with Lib::XML by amasidlover

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