$ plackup -s Feersum --pre-fork=8 --access-log=/dev/null app.psgi &
$ ab -n 10000 -c 100 http://localhost:5000/
(snip)
Concurrency Level:      100
Time taken for tests:   0.542 seconds
Complete requests:      10000
Failed requests:        0
Total transferred:      400000 bytes
HTML transferred:       20000 bytes
Requests per second:    18437.56 [#/sec] (mean)
Time per request:       5.424 [ms] (mean)
Time per request:       0.054 [ms] (mean, across all concurrent requests)
Transfer rate:          720.22 [Kbytes/sec] received