Thanks to: MJ Dominus's discussion of Schwartzian Transform http://perl.plover.com/yak/hw1/samples/slide004.html Dave Cross's discussion of sorts http://dave.org.uk/talks/idiomatic/sec_07_00.html Joseph N. Hall's notes on speed of regular sort vs. S. T. http://www.stllinux.org/meeting_notes/1997/0918/schwtr.html