This problem came up on the mailing list recently:

http://groups.google.com/group/clojure/browse_thread/thread/5e0c078d0ad8b8bc#

You might want to compare your code to what was done here, but at a
glance the implementations are similar.

You provide relative speed comparisons (Such and such is %
better...).  Would you be able to share absolute times as well?  I'm
just curious at this point.

Sean

On Jun 6, 12:41 am, Parth Malwankar <parth.malwan...@gmail.com> wrote:
> Hello,
>
> In order to understand the agent model of Clojure
> better I wrote the alioth shootout threadring benchmark [1].
> I ran some tests to compare it with the Java and Scala
> implementation [2, 3] which I picked from the published
> benchmarks.
>
> The clojure code can be found here:http://gist.github.com/124688
>
> The benchmark from my two core 1.7GHz pentium system
> (ubuntu 9.04) w/ 1GB RAM can be found 
> here:http://spreadsheets.google.com/ccc?key=rQLD6jgTTV5OqXwHdXtrTyg
>
> In summary, scala implementation is 6.34x times slower than
> java, clojure is 7.8x. Avg CPU consumption is 93.3% for java and
> 179.2% and 131.34% for scala and clojure respectively.
>
> I thought of sharing this in case others are interested.
> As this is my first program using clojure agents I would appreciate
> any
> comments on improving the Clojure implementation (or in case
> there are any bugs).
>
> Thanks.
> Parth
> PS: For the Java implementation I happen to pick the "interesting
> alternate programs" (Java 6 -server #5) but it was already quite
> late in the cycle when I realized that. So the Java numbers are
> probably better than the other java implementations.
>
> [1]http://shootout.alioth.debian.org/u32q/benchmark.php?test=threadring&;...
> [2]http://shootout.alioth.debian.org/u32q/benchmark.php?test=threadring&;...
> [3]http://shootout.alioth.debian.org/u32q/benchmark.php?test=threadring&;...
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