[didibus]

Its not 2 seconds. With the time command, you have to look at the elapsed time. Clojure does parallel execution, that's why you see CPU at 198%. So the user and sys time are the sum of the time on each cores.

So the actual time was 0.839s.

Which means Clojure 1.9 on your computer boots and shutdowns its repl in under a second.