>>>>> "D" == David Alan Black <dblack / candle.superlink.net> writes: D> I've now tried a few different ways of generating the word lists, and D> it does seem that the unpack approach scales much better than the D> prime number hash, as the word length gets longer. Well, it was my first impression. I've the strange impression that "prime" suffer from conversion fixnum-bignum but also by the number of objects generated (apparently "prime" generate, internally, more objects than "unpack"). And on a simple script (which do _only_ anagram-finding) and a big file with many different words you can easily see the effect of the GC. Guy Decoux