For those who are interested in Clojure performance, I've updated my flocking example from earlier, which uses Roland's excellent Processing library. http://github.com/swannodette/clojure-stuff/blob/80035bb3b76c21d39d6f801aaaa1e9a27aa1116b/flocking.clj
It is twice as fast as the previous version and purely functional, no reusing Java arrays or reusing PVector objects. 1. Use make-arrays wisely and it works well. 2. Do your math in Java (PVector in my case), Clojure's built in vectors just aren't designed for it, which is FINE. 3. Type-hint very very very very agressively. *warn-on-reflection* is a life saver, thanks Rich. It's still a bit slower (2X-3X) than the Processing version, but I prefer the fact that this one is functional over the original, no changing vector objects in place. This pretty much as far as I can see it going down this path, it is pretty much a direct translation of the Java version minus mutation, in the next version I hope to incorporate some of the suggestions in reply to my earlier post (FMM in particular). David --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~----------~----~----~----~------~----~------~--~---
