Hi, as Michael G Schwern showed me I posted a wrong information about ruby in this list, after testing I found that ruby and perl performance are roughly equivalent in very simple tests such as a fibonacci's series computation. My misconception came from an older benchmark I did and it did not involve ruby but python which was slower than perl. So I'd say that ruby's problem are no CPAN and bad windows support and both can hopefully be corrected if it can adopt parrot, therefore the conclusion stays the same. once more sorry for the disinformation and thanks to Michael for pointing to me that ruby is even better than I thought. Long live parrot Benoit