Hello i've been reading this article, wich has a few benchmarks (inclding a ruby related one) and many theorical explanations of regex matching algorithms: http://swtch.com/~rsc/regexp/regexp1.html I became a little worried since i'm making hevy use of regexes in a program of mine that shortly i'll have to run on each of thousands of text files. * Do anyone now if what is said relates to ruby 1.8.6 * If so, is it going to change ? Thank you! -- Posted via http://www.ruby-forum.com/.