$ man Gazelle | head
Gazelle(3)          User Contributed Perl Documentation         Gazelle(3)

NAME
       Gazelle - a Preforked Plack Handler for performance freaks

SYNOPSIS
           $ plackup -s Gazelle --port 5003 --max-reqs-per-child 50000 \
                -E production -a app.psgi

$ plackup -s Gazelle --port 5003 --max-reqs-per-child 50000 -E production -a app.psgi &
$ ab -n 10000 -c 100 http://localhost:5003/
(snip)
Document Path:          /
Document Length:        2 bytes

Concurrency Level:      100
Time taken for tests:   0.430 seconds
Complete requests:      10000
Failed requests:        0
Total transferred:      940000 bytes
HTML transferred:       20000 bytes
Requests per second:    23277.36 [#/sec] (mean)
Time per request:       4.296 [ms] (mean)
Time per request:       0.043 [ms] (mean, across all concurrent requests)
Transfer rate:          2136.79 [Kbytes/sec] received