Команда:

ab -n 1000 -c 100 -w http://localhost/

На localhost в index.php такое:

<?php
	
echo get_current_user();

Для mod_ruid2:

Server Software: Apache/2.4.10
Server Hostname: localhost
Server Port: 80
Document Path: /
Document Length: 8 bytes
Concurrency Level: 100
Time taken for tests: 0.477 seconds
Complete requests: 1000
Failed requests: 0
Total transferred: 174000 bytes
HTML transferred: 8000 bytes
Requests per second: 2095.91
Transfer rate: 356.14 kb/s received
Connnection Times (ms)
min avg max
Connect: 0 0 4
Processing: 6 46 52
Total: 6 46 56

mpm_itk:

Server Software: Apache/2.4.10
Server Hostname: localhost
Server Port: 80
Document Path: /
Document Length: 8 bytes
Concurrency Level: 100
Time taken for tests: 2.076 seconds
Complete requests: 1000
Failed requests: 0
Total transferred: 174000 bytes
HTML transferred: 8000 bytes
Requests per second: 481.72
Transfer rate: 81.86 kb/s received
Connnection Times (ms)
min avg max
Connect: 0 0 3
Processing: 6 198 331
Total: 6 198 334

Выходит, на тестируемом vps mod_ruid2 примерно в 4,3 раза быстрее, чем mpm_itk.