First of all, Saxon is just an XSLT engine, not a DOM implementation, so the above does not answer the question asked. Second of all, the gnome libxslt engine is faster and almost as compliant as Saxon (I don't think there are any compliance issues left in Saxon, which is probably because Michael Kay is on the W3C XSLT committee). I don't think there are any *known* compliance issues with libxslt, so you really should give XML::LibXSLT a try again. I'm sure if you find some compliance issues Daniel Veillard will be very quick at fixing them.