Noir is a series of extensions on Compojure.
Anyways, I can give you bullshit benchmarks if you want. The numbers are sort of meaningless, the benchmark synthetic, the methodology poor but it's almost all against the server's favor.
(GET "/hello" [] {:status 200 :body "Yo!"}))
~ > httperf --hog --server localhost --port 9999 --uri=/hello --num-conn 5000 --num-calls 1
...
Connection rate: 4769.8 conn/s (0.2 ms/conn, <=1 concurrent connections)
Connection time [ms]: min 0.2 avg 0.2 max 3.8 median 0.5 stddev 0.1
Connection time [ms]: connect 0.0
Connection length [replies/conn]: 1.000
...
Reply rate [replies/s]: min 0.0 avg 0.0 max 0.0 stddev 0.0 (0 samples)
Reply time [ms]: response 0.2 transfer 0.0
Reply size [B]: header 98.0 content 3.0 footer 0.0 (total 101.0)
Reply status: 1xx=0 2xx=4999 3xx=0 4xx=0 5xx=0
Again, these numbers are not precise or useful. They're just there to put some flags in the ground for further exploration should you want to do a rigorous comparison.