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Lumo – A fast, standalone ClojureScript REPL that runs on Node.js and V8
One common complaint of Clojure REPLs is their [startup time](http://puredanger.github.io/tech.puredanger.com/2013/12/01/clj-problems/). Although that complaint is often somewhat unfounded (and related to tooling), it still takes the bare Clojure JAR about 1 second to start on new hardware…