I have an application using Java interop, in which I can define a class using either deftype or defrecord. It has one field, containing an atom containing a double, and a few methods. One of the methods is specified by an interface defined in Java, and that method is called from Java. This method is called many times in an inner loop. I don't use any of the extra functionality provided by defrecord, but in otheri, similar programs, I will.
When I use defrecord, the speed of the program is about 25% of its speed when I use deftype. This is a one-line change. I'm testing speed simply by running the program for a long time, and timing it. I've done this test repeatedly, so there's no reason to think the differences have to do with other processes running on my machines. When I benchmark simple uses of defrecord and deftype using criterium, they're about the same speed. Is there any obvious reason to think that there are situations--e.g. method calls from Java--in which deftype would be expected to be significantly faster than defrecord? I can construct a minimal example based on my program and post it here, but I thought I'd check first whether there is something obvious that I don't get. [The test I did using defrecord is below. I also replaced 'defrecord' with 'deftype' and did the same test. I would think that the JIT compiler wouldn't be smart enough to optimize away whatever differs between defrecord and deftype, but maybe I'm wrong about that. (defrecord R [x y] P (incx2y [this] (reset! x (inc @y))) (decy2x [this] (reset! y (dec @x)))) (def r (R. (atom 2) (atom 1))) (bench (def _ (dotimes [_ 50000000] (incx2y r) (decy2x r) r))) ] -- 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 --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
