Hi Avram,
Assuming you're using the Sun/Oracle JDK, you can increase the size of the
Java heap with the -Xmx command-line option. For example:
java -Xmx512mb -cp clojure.jar:your-source-dir clojure.main
Will run Java with a 512 MB heap. This increases the amount of memory
available to your program. Obviously, you don't want the heap to be larger
than the available RAM.
With Leiningen, you can add the :jvm-opts option in project.clj, as shown
here:
https://github.com/technomancy/leiningen/blob/master/sample.project.clj#L142
More generally, this line:
(def signals (vec ...))
says that you want the entire result, as a vector, stored as the value of
the Var `signals`. That means your entire result data must fit in the Java
heap. For a 37 MB file, that's not unreasonable, but as soon as your file
gets larger than your available RAM, you'll have to come up with an
alternate approach.
-Stuart Sierra
clojure.com
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