For those interested, I managed to improve the performance of my original program from 2 minutes 40 seconds to decode 1000+ files down to 2 minutes. I'm still far from my goal, but it's an improvement, especially since the code is shorter and (IMO) cleaner. You can see it here: http://bitbucket.org/gnuvince/clj-starcraft/src/tip/src/starcraft/replay/parse.clj
And here's another question, running the program with -Xprof shows that nearly 20% of my execution time is spent calling java.lang.reflect.Array.set. Is there something wrong with the way I type hint my array in make-reader? Thanks, Vincent. On Mar 19, 8:12 pm, Vincent Foley <vfo...@gmail.com> wrote: > Hello, > > For the past few days, I've been trying, unsuccessfully, to make an > application I wrote faster. A Java program that performs, more or > less, the same task takes 12 seconds (on my machine) to parse 1000 > files; my Clojure program takes nearly 3 minutes. This more than an > order of magnitude slower! Using the profiling tools available with > the JVM, I quickly determined which function was the costliest. I > copied it into a simple script file to profile it in isolation. I > have made the script and the profile results (long!) available at this > URL:http://gist.github.com/82136 > > I'm finding the results puzzling: is dereferencing a var *that* > expensive? Can anyone tell me if they see something fundamentally > wrong with my approach that would explain this abysmal performance? > > Thank you, > > Vincent. > > P.S.: I am using Sun's JVM 1.6.0_10 as shipped in Ubuntu Ibex. My > machine is an Athlon 64 X2 4200+ with 3 GB of RAM. --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
