Thanks! If anyone is interested, I posted some side-by-side benchmarks of 1.6.8 vs 1.8.0 on my Win2k box at home. You'll note the considerable improvement in IO read operations. As per the suggestion of some folks on IRC, I ran them a few times to make sure disk caching didn't play a part in the results. http://ruby-miscutils.sourceforge.net/compare_author_berger-2.html Regards, Dan