아파치에 기본적으로 들어 있는 기능인지만 많이들 모르고 계신거 같네요.
윈도우에서 사용할 수 있는 웹스트레스 툴과 비슷한 기능을 가지고 있습니다.

[root@www root]# /usr/local/apache/bin/ab -n 1 http://www.hanserver.net/
This is ApacheBench, Version 1.3d <$Revision: 1.65 $> apache-1.3
Copyright (c) 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Copyright (c) 1998-2002 The Apache Software Foundation, http://www.apache.org/

Benchmarking www.hanserver.net (be patient).....done
Server Software:        Apache/1.3.26                                      
Server Hostname:        www.hanserver.net
Server Port:            80

Document Path:          /
Document Length:        12483 bytes

Concurrency Level:      1
Time taken for tests:   0.015 seconds
Complete requests:      1
Failed requests:        0
Broken pipe errors:     0
Total transferred:      12648 bytes
HTML transferred:       12483 bytes
Requests per second:    66.67 [#/sec] (mean)
Time per request:       15.00 [ms] (mean)
Time per request:       15.00 [ms] (mean, across all concurrent requests)
Transfer rate:          843.20 [Kbytes/sec] received
[root@www root]#