diff --git a/project.clj b/project.clj
index e3985b4..7f34a34 100644
--- a/project.clj
+++ b/project.clj
@@ -6,13 +6,16 @@
   :dependencies [[org.clojure/clojure    "1.4.0"]
                  [expectations           "1.4.43"]
                  [org.iq80.snappy/snappy "0.3"]]
-  :profiles {:1.4  {:dependencies [[org.clojure/clojure "1.4.0"]]}
-             :1.5  {:dependencies [[org.clojure/clojure "1.5.1"]]}
-             :dev  {:dependencies []}
-             :test {:dependencies [[org.xerial.snappy/snappy-java "1.0.5-M3"]]}}
-  :aliases {"test-all"  ["with-profile" "test,1.4:test,1.5" "expectations"]
-            "test-auto" ["with-profile" "test" "autoexpect"]
-            "start-dev" ["with-profile" "dev,test" "repl" ":headless"]}
+  :profiles {:1.4   {:dependencies [[org.clojure/clojure "1.4.0"]]}
+             :1.5   {:dependencies [[org.clojure/clojure "1.5.1"]]}
+             :dev   {:dependencies []}
+             :test  {:dependencies [[org.xerial.snappy/snappy-java "1.0.5-M3"]]}
+             :bench {:dependencies []
+                     :jvm-opts ["-server" "-XX:+UseCompressedOops"]}}
+  :aliases {"test-all"    ["with-profile" "test,1.4:test,1.5" "expectations"]
+            "test-auto"   ["with-profile" "test" "autoexpect"]
+            "start-dev"   ["with-profile" "dev,test,bench" "repl" ":headless"]
+            "start-bench" ["trampoline" "start-dev"]}
   :plugins [[lein-expectations "0.0.7"]
             [lein-autoexpect   "0.2.5"]
             [codox             "0.6.4"]]