I have a project where I would like to have a much larger world than
the 80x80 world in Rich's ants.clj [1] demo. When I bring the world
up past about 600x600, I get a java.lang.OutOfMemoryError.
Is this expected? If so, is there another reasonable way to represent
a large grid with concurrent processes roaming about? At first, I
only need to store a floating-point value in each cell location. But
I'm also curious to know why this is such a huge memory hog (I have a
2 GB system). I'm also ignorant of JVM issues, so any tips there
would be helpful.
Here is the relevant code:
; larger world
(def dim 600)
(defstruct cell :food :pher)
;world is a 2d vector of refs to cells
(def world
(apply vector
(map (fn [_]
(apply vector (map (fn [_] (ref (struct cell 0
0)))
(range dim))))
(range dim))))
Thanks!
Duane Johnson
[1] http://clojure.googlegroups.com/web/ants.clj
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