Well, if the default max heap of your JVM is not enough to run the program successfully to completion, then I don't think that you will be very happy in getting the program to complete :-) Which JVM are you using, by the way? And what is the full command line you are using for the Java program and the Clojure program when you run them? It seems odd that the Java and Scala programs are going over 400 MB of memory use, but the Clojure version is staying so low. Are you using an unmodified version of this Clojure source file to get these results?
http://shootout.alioth.debian.org/u64/program.php?test=binarytrees&lang=clojure&id=5 The default max heap size of my JVMs seems to be at least 512 MB, although I don't know exactly what value it is. It is certainly enough for this program to finish, and get to a memory utilization of nearly 512 MB. Andy On Mar 15, 2011, at 9:54 AM, Nick Zbinden wrote: > Hi, > > I did not mention that earlier but the benchmark sais no change in > heapsize. > > See here: > http://shootout.alioth.debian.org/u32/performance.php?test=binarytrees > > Does Clojure just have a much smaller heapsize in the standart case? > > > On Mar 15, 5:19 am, Andy Fingerhut <andy.finger...@gmail.com> wrote: >> On a MacBook Pro with 2.4 GHz Intel Core 2 Duo and 3 GB of RAM (although the >> program only used about half a gig at most), that program finished in about >> 33 seconds, using 38.5 sec of user + system CPU time. The average CPU >> utilization was 126% (all of one CPU core, and 26% of another, on average). >> The CPU utilization never went below 90% of one CPU core. >> >> From the memory use graph you link to, the memory use never goes over about >> 128 MB. I would bet that is the default maximum heap size in your JVM, or >> perhaps one specified explicitly. That is likely not enough, and your >> program is causing the JVM to invoke garbage collection repeatedly. >> >> I'd recommend using a -Xmx512m argument on the command line, or maybe a bit >> more, and see if things speed up. >> >> Andy >> >> On Mar 14, 2011, at 6:25 PM, Nick Zbinden wrote: >> >>> Hi, >> >>> I'm working with binarytree benchmark from the Language Shotout. >>> http://shootout.alioth.debian.org/u64/program.php?test=binarytrees&la... >> >>> Its basiclly a port from the java version. >>> http://shootout.alioth.debian.org/u64/program.php?test=binarytrees&la... >> >>> The Problem with the Clojure version you can see here: >>> https://github.com/nickik/IDPA-Programmiersprachen-Benchmarken/blob/m... >>> https://github.com/nickik/IDPA-Programmiersprachen-Benchmarken/blob/m... >> >>> Clojure does not use the CPU to the full extened witch suggest that >>> there something blocking it. I tried to figure out what it was with >>> profiling but I never did that befor and I had no success. >> >>> Node that the Clojure uses less memory too. >>> https://github.com/nickik/IDPA-Programmiersprachen-Benchmarken/blob/m... >> >>> Has anybody an Idea why this happens? >> >>> I ported the programm to 1.3 but that didn't help: >> >>> 1.2 version: >>> https://github.com/nickik/IDPA-Programmiersprachen-Benchmarken/blob/m... >> >>> 1.3 >>> version:https://github.com/nickik/IDPA-Programmiersprachen-Benchmarken/blob/m... >>> (all the benchmarks where made with the 1.2er programm) >> >>> thx for the help >> >>> -- >>> 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 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 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
