diff --git a/project.clj b/project.clj
index c4ea33d..a6b5bef 100644
--- a/project.clj
+++ b/project.clj
@@ -8,10 +8,11 @@
              "build-signature-timestamp" "unset"
              "Implementation-Version" "unset"
              }
-
+  :jvm-opts ["-Xmx2g"]
   :license {:name "GNU General Public License v2"
             :url "http://www.gnu.org/licenses/gpl-2.0.html"}
-  :plugins [[lein-marginalia "0.7.1"]]
+  :plugins [[lein-marginalia "0.7.1"]
+            [lein-gorilla "0.3.2"]]
   :dependencies [[org.clojure/clojure "1.5.1"]
                  [org.clojure/math.combinatorics "0.0.7"]
                  [org.clojure/tools.trace "0.7.8"]
diff --git a/src/mw_engine/core.clj b/src/mw_engine/core.clj
index b066fb3..8a0ca95 100644
--- a/src/mw_engine/core.clj
+++ b/src/mw_engine/core.clj
@@ -97,7 +97,7 @@
   (let [state {:world (transform-world world init-rules) :rules rules}]
     (:world 
       (last 
-        (do-all 
+        (doall 
           (take generations 
                 (iterate transform-world-state state)))))))
 
@@ -109,5 +109,12 @@
       (dosync
         (ref-set r (transform-world (deref r) rules))))
     (deref r)))
+
+(defn run-world3
+  [world init-rules rules generations]
+  (reduce (fn [world _iteration] 
+            (transform-world world rules))
+        (transform-world world init-rules)
+        (range generations)))