On Jun 30, 3:02 pm, igorrumiha <igorrum...@gmail.com> wrote:
> Greetings everyone,
>
> I didn't actually plan it but I ended up participating in the ICFP
> programming contest (http://www.icfpcontest.org). This year the task
> was to move satellites from one orbit to another, to meet with other
> satellites etc. Quite interesting, and to start it all you need to
> implement a virtual machine for the physics simulator.
>
> I used Clojure and managed to solve the first of the four problems,
> which means I didn't get really far. I was simply too slow to get to
> the really interesting stuff. I have written a rather long article
> describing my solution so I hope some of you may find it interesting:
>
> http://igor.rumiha.net/tag/icfp/
>
> I have also put the code on
> github:http://github.com/irumiha/icfp-loneclojurian/tree/master
>
> I hope someone has the interest and the time to take a look at the
> code. I consider myself a Clojure beginner and any suggestions are
> welcome, especially considering possible speed improvements to the
> virtual machine. According to some of the people on the #icfp-contest
> channel my VM implementation is 500x to 1000x slower than a typical
> implementation written in C. It is, on the other hand, in the same
> performance range as some VMs written in Python. Some people claim
> that the JVM can give you C-like performance, but I would be more than
> happy if I got my VM to be 10x slower than the C ones :)
>
> Igor.
I read somewhere that someone got down to 7 clock cycles per VM
instruction using JIT. You compile to JVM/.NET (via Clojure, e.g.),
and it JITs it for you.
I found this year's contest description super-boring by the way and
decided not to even read the whole problem statement.
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