XML::LibXSLT is a fast XSLT library, based on the GNOME libxslt engine. . Performance is currently about twice that of XML::Sablotron (based on XSLTMark tests converted to Perl). . The libxslt processor is also highly standards compliant, with practically all of XSLT 1.0 being supported in version 0.9 of libxslt.