$ /opt/apps/apache/bin/ab -n 250000 -c 3 http://127.0.0.1:11208/hello.php
This is ApacheBench, Version 2.3 <$Revision: 1757674 $>

Server Software:        Apache/2.4.25
Server Hostname:        127.0.0.1
Server Port:            11208

Document Path:          /hello.php
Document Length:        18 bytes

Concurrency Level:      3
Time taken for tests:   14.386 seconds
Complete requests:      250000
Failed requests:        0
Total transferred:      54500000 bytes
HTML transferred:       4500000 bytes
Requests per second:    17377.86 [#/sec] (mean)
Time per request:       0.173 [ms] (mean)
Time per request:       0.058 [ms] (mean, across all concurrent requests)
Transfer rate:          3699.58 [Kbytes/sec] received