very cool Joel! I'd also be interested in start up time of avian vs. hotspot, i.e. does avian make it viable to use clojure for short, quick scripts?
On Jul 15, 11:59 am, Joel Dice <joel.d...@gmail.com> wrote: > Hi all, > > I thought I'd share the results of a fun little excercise I did this > morning: running Clojure on a VM with native support for tail call > optimization and first class continuations. Any Schemers on this list > will probably appreciate it. > > The VM in question is Avian (http://oss.readytalk.com/avian/), built with > optional tail call and continuation features enabled and using the OpenJDK > class library. It's not nearly as fast or sophisticated as e.g. Hotspot, > but it has some features that make it interesting for running non-Java > languages. I'm using the latest commit from the Git repository. > > For example, here's what happens if you recurse too deeply using Hotspot: > > $ java -cp clojure.jar clojure.main > Clojure 1.2.1 > user=> ((fn this [n] (if (= n 1000000) n (this (+ n 1)))) 0) > java.lang.StackOverflowError (NO_SOURCE_FILE:0) > user=> > > With Avian, there is no overflow, and we also get to play with > continuations: > > $ ../avian/build/linux-x86_64-tails-continuations-openjdk-src/avian > -Xmx512m -cp clojure.jar clojure.main > Clojure 1.2.1 > user=> ((fn this [n] (if (= n 1000000) n (this (+ n 1)))) 0) > 1000000 > user=> (defn call-cc [function] > (avian.Continuations/callWithCurrentContinuation > (reify avian.CallbackReceiver > (receive [_ continuation] > (function (fn [result] (.handleResult continuation result))))))) > #'user/call-cc > user=> (call-cc (fn [continuation] (continuation "hello, world!"))) > "hello, world!" > user=> > > For more information about how continuations work in Avian, please > seehttp://oss.readytalk.com/avian/javadoc/avian/Continuations.html. > > Anyway, I think this is an interesting experiment since it shows that > if/when tail call and continuation support are integrated into the JVM > officially (http://openjdk.java.net/projects/mlvm/), Clojure could benefit > with few or no modifications. -- 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
