Did you do two exact same drip runs in a row? It has to hash and preload a JVM with the same classpath setup to work. $ time java -jar clojure-1.3.0.jar ad

Did you do two exact same drip runs in a row? It has to hash and preload a JVM with the same classpath setup to work. $ time java -jar clojure-1.3.0.jar add_1_and_1.clj real 0m0.690s user 0m0.827s sys 0m0.030s $ time drip -jar clojure-1.3.0.jar add_1_and_1.clj real 0m0.879s user 0m1.020s sys 0m0.040s $ time drip -jar clojure-1.3.0.jar add_1_and_1.clj real 0m0.177s user 0m0.033s sys 0m0.020s $ time drip -jar clojure-1.3.0.jar add_1_and_1.clj real 0m0.176s user 0m0.050s sys 0m0.017s