Creating a small object like that is cheap on the JVM. There are much better places to put optimization effort.
On Wed, Feb 18, 2009 at 1:07 PM, Michel Salim <michel.syl...@gmail.com>wrote: > > > > On Feb 18, 3:17 am, Laurent PETIT <laurent.pe...@gmail.com> wrote: > > Hello, > > > > 2009/2/18 CuppoJava <patrickli_2...@hotmail.com> > > > > > > > > > Hi, > > > I've noticed that I'm creating a lot of maps of functions, and I'm > > > wondering if there's a performance penalty for this. > > > > > ie. > > > (defn create_fn [] > > > (fn [] (println "hi"))) > > > > If you use AOT compilation, you'll see that this code will add 2 new > classes > > to the namespace it is declared in : one class for create_fn itself, and > one > > anonymous class for (fn [] (println "hi")) > > > > > ((create_fn)) <--- Does this "create" a new function every-time it's > > > called? Or is the function code cached somewhere? How much of a > > > performance penalty does this incur? > > > > Each call to create_fn will create a new instance (object) of the > anonymous > > class for (fn [] (println "hi")) > > > Is this something that will eventually be optimized? This anonymous > function does not capture any variable, and therefore can just be > instantiated once. > > Regards, > > -- > Michel S. > > > --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
