get the haskell platform http://hackage.haskell.org/platform/linux.html cabal install loli hack-handler-simpleserver ghc --make app.hs PORT=3001 ./app ➜ ~ sudo ab -n 2000 -c 20 http://127.0.0.1:3001/ Requests per second: 9760.91 [#/sec] (mean) Time per request: 2.049 [ms] (mean) Time per request: 0.102 [ms] (mean, across all concurrent requests) Transfer rate: 0.00 [Kbytes/sec] received probably goes faster with the libevent backend, but this'll do for now.