[oXygen-user] transforming LOTS of files with saxon

I want to run a simple XSLT script against each of about 50,000 small RDF files, sending the output to a single file. I can do it at the command line, but I'd like it to complete within my lifetime, or preferably before lunch. Is there a better way than saying "for f in *.rdf; do saxon $f mystylesheet.xsl >> output.xml; done" ?