hmm... I'm confused. From the numbers in your example it looks like server has an advantage by a factor of about 2x. But in your text you say that the client version has an advantage with complicated code. What am I missing? Does one JVM have the advantage in one situation and one in others?
Hank On Tue, Jan 27, 2009 at 3:20 PM, dreish <dresweng...@dreish.org> wrote: > > java -server is not the default on Macs. It makes a huge difference > for Clojure. > > % java -jar clojure.jar > Clojure > user=> (time (reduce #(+ %1 %2 (if (odd? %1) -1 0)) (range 10000000))) > "Elapsed time: 11793.18 msecs" > 49999990000001 > > % java -server -jar clojure.jar > Clojure > user=> (time (reduce #(+ %1 %2 (if (odd? %1) -1 0)) (range 10000000))) > "Elapsed time: 6757.651 msecs" > 49999990000001 > > The rough rule I've noticed is that the more complicated the Clojure > code, the bigger the advantage -client has over -server. > > > On Jan 27, 3:04 am, Keith Bennett <keithrbenn...@gmail.com> wrote: >> All - >> >> I tried testing the code athttp://clojure.org/Refsto see what the >> benefit of multicore processing would be. To my surprise, the my-pmap >> function took *more* time, not less, than the map function. >> >> Whereas the times listed in the article were approximately 3.1 and 1.7 >> seconds, on my MacBookPro 2.33 GHz Intel Core 2 Duo laptop, my times >> were 14.9 and 15.1 seconds. >> >> What is the correct interpretation of these results? Does one need >> more than 2 CPU's to see a benefit? Or is the Mac JVM only using one >> CPU instead of two? Or...? >> >> ...and is there something wrong with my setup that both took so long? >> >> Thanks for any enlightenment. >> >> - Keith Bennett > > > -- blog: whydoeseverythingsuck.com --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
