Each of these is after having run each command several times (i.e., not cold):
Planck
orion:planck-demo mfikes$ time ./planck -e '(+ 1 2)'
3
real 0m0.969s
user 0m0.975s
sys 0m0.203s
Clojure 1.7.0
orion:clojure-1.7.0 mfikes$ time java -cp clojure-1.7.0.jar clojure.main -e '(+ 1 2)'
3
real 0m1.247s
user 0m2.214s
sys 0m0.239s
lein repl
orion:clojure-1.7.0 mfikes$ time echo '(+ 1 2)' | lein repl
nREPL server started on port 59045 on host 127.0.0.1 - nrepl://127.0.0.1:59045
REPL-y 0.3.5, nREPL 0.2.6
Clojure 1.6.0
Java HotSpot(TM) 64-Bit Server VM 1.8.0_45-b14
Docs: (doc function-name-here)
(find-doc "part-of-name-here")
Source: (source function-name-here)
Javadoc: (javadoc java-object-or-class-here)
Exit: Control+D or (exit) or (quit)
Results: Stored in vars *1, *2, *3, an exception in *e
user=> (+ 1 2)
3
user=> Bye for now!
real 0m4.516s
user 0m10.186s
sys 0m1.363s