Comments on: An optimization job is never done

By: Olivier

Olivier — Thu, 17 Dec 2009 13:15:54 +0000

I’m not surprised you are interested in this kind of stuff: Conway, Turing, Penrose; mathematical toys for geeky persons. By the way, it’s funny a coincidence I just played yesterday (during office time) with the game of life (I had just told Jean-François Totain about: he had never heard of it).

PS: didn’t even try to understand your posts! Can’t you use a humanly understandable dialect rather that sigma centauri inhabitants’ native tongue?

By: Optimising Mandelbrot « The Development Jungle

Optimising Mandelbrot « The Development Jungle — Tue, 24 Nov 2009 23:02:47 +0000

[...] the get-coord function use primitives to get a further performance boost. However, as cgrand says, an optimisation job is never done and for now I believe the performance is “good [...]

By: James Swift

James Swift — Fri, 20 Nov 2009 04:27:41 +0000

Hi,

interestingly this works on my Mac fine with a fresh build from github but gets stuck on the first frame on my AMD based RedHat Linux box and also on a Sun T2000 Sparc box.

Lau’s originals run fine.

Anyone else having these problems?

James.

By: cgrand

cgrand — Thu, 19 Nov 2009 09:33:12 +0000

@rkrastev #^objects is a hinting shortcut for objects arrays. Prior to its addition to master, the only way to hint an objects array was the ugly #^"[Ljava.lang.Object;". #^objects is similar to shortcuts for hinting primitive arrays right now it's only documented here. Note that clojure.org documents reflects the last stable release.

By: rkrastev

rkrastev — Thu, 19 Nov 2009 08:45:19 +0000

Thanks, it works with the newest clojure.jar but the question still stands. What is objects and where we can read more about it? It will be very helpful to learn Clojure if you explain in more details your code.

By: cgrand

cgrand — Thu, 19 Nov 2009 07:08:01 +0000

@hiredman: this unrolling is a one-shot (how often is count+for is a bottleneck?) so I thought that introducing a macro would just make the code more complex. But if you have a simple macro for the job I’m eager to see it .

By: hiredman

hiredman — Wed, 18 Nov 2009 22:18:30 +0000

why not unroll neighbours-count using a macro or definline instead of the blob of (+ …)

By: cgrand

cgrand — Wed, 18 Nov 2009 16:41:40 +0000

@rkrastev all my code use the development (master) branch of Clojure.

By: rkrastev

rkrastev — Wed, 18 Nov 2009 15:26:26 +0000

Unable to resolve classname: objects

By: Lau Jensen

Lau Jensen — Wed, 18 Nov 2009 10:58:50 +0000

Hey Christophe.

It’s official: You’re insane! :)

Great work on tweaking and tuning – Please let me know once you’ve enhanced the Clojure compiler to do this type of stuff on it’s own!

Keep blogging, Lau