There's Planck for OS X https://github.com/mfikes/planck https://github.com/mfikes/planck It uses JavaScriptCore and starts practically instantly. There's some

There's Planck for OS X https://github.com/mfikes/planck https://github.com/mfikes/planck It uses JavaScriptCore and starts practically instantly. There's some work being done to port it to Linux/Windows as well. Here's an example: cat foo.cljs #!/usr/local/bin/planck (println "hello world: clojurescript -> planck -> as shell script") ./foo.cljs hello world: clojurescript -> planck -> as shell script Planck can be installed using homebrew now as well. Another promising option is Pixie https://github.com/pixie-lang/pixie https://github.com/pixie-lang/pixie