Hmm yesterday Rick said that the new changes give clojure a chance to put down the 'scala is faster then clojure' argument. So I figured I give it a try and implemented some of the shootouts: fannkucken-redux and the regexdna example. I found some interesting things especially once I got carried away with hoeck's question how it looks when you benchmark ideomatic clojure 1.2-master vs 1.2-equal.
As a foreword: 1) I most likely suck at optimizing so I very much welcome any suggestions and changes. 1.1) As a result of that please don't take the results I got as abseluts so they still are interesting 2) The benchmarks I did are flawed and unfair since I did not do warmup runs nor did I remove the JVM startup time, BUT they are unfair for everyone in the same manner so I hope that evens things out a bit. 3) The idiomatic code is NOT optimized at all, it is the nicest way I found to write the code, or at least the one that seemed most natural to me. My findings: A) Comparison to Scala So first of all it seems clojure is still slower then scale (at least in this particular benchmark and with my very limited skills in optimization), the optimization was done but there are still things to improve and I know that but we're coming closer :) B) The process of optimization During the process of optimization I sadly did not feel big relieve brought by the equal branch, optimizing code feels still horrible and painful. And the code that I got looks more like java with different parenthethes then clojure to me - I personally feel ashamed to have written it :( C) ideomatic clojure master vs. equal I know again this is just a one piece observeration but I am torn. Over all execution time for the fannkuchen example has degraded nearly 20% with the equal branch (using same code) yet in profiling it looked faster. I am not certain why it seems that equal adds some overhead, hoeck had the same finding when not benchmakring JVM execution speed but using criterium to benchmark and even in code benchmarking (using time) indiceates equal to be slower in this case. I'm not sure how to explain this to be frank, my guess is that some optimization hurt the list speed or that the profiler makes odd things. Code can be found here: http://github.com/Licenser/clj-shootout screenshots of some profiling results: http://grab.by/55po (euqual branch) http://grab.by/55pp (master branch) Regards, Heinz -- 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 Note that posts from new members are moderated - please be patient with your first post. 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
