Fast Clojure hello world using GraalVM

fast-clojure-hello-world-using-graal-vm.md

Fast Clojure Hello World Using GraalVM On Mac

Performance

Version	Command	Time (seconds)
Java	time java -jar target/fastclj-1.0-standalone.jar	1.354
GraalVM	time ./fastclj-1.0-standalone	0.014

Details

lein new fastclj; cd fastclj

cat<<'END'>./project.clj
(defproject fastclj "1.0"
  :description "Fast hello world using GraalVM"
  :dependencies [[org.clojure/clojure "1.9.0"]]
  :main fastclj.core
  :aot  :all)
END

cat<<'END'>./src/fastclj/core.clj
(ns fastclj.core (:gen-class))
(defn -main [& args] (println "Hello world!"))
END

lein compile && lein uberjar

time java -jar target/fastclj-1.0-standalone.jar

wget https://github.com/oracle/graal/releases/download/vm-1.0.0-rc12/graalvm-ce-1.0.0-rc12-macos-amd64.tar.gz
tar zxvf graalvm-ce-1.0.0-rc12-macos-amd64.tar.gz

GRAAL_BIN="$PWD/graalvm-ce-1.0.0-rc12/Contents/Home/bin"
$GRAAL_BIN/native-image \
  -H:+ReportUnsupportedElementsAtRuntime \
  -J-Xmx3G -J-Xms3G --no-server \
  -jar target/fastclj-1.0-standalone.jar

ls -l ./fastclj-1.0-standalone

time ./fastclj-1.0-standalone