Apache Bench

http://httpd.apache.org/docs/current/programs/ab.html

http://en.wikipedia.org/wiki/ApacheBench

http://zhoto.tistory.com/entry/20061108-apache-ab%EB%A5%BC-%EC%9D%B4%EC%9A%A9%ED%95%9C-%EB%B2%A4%EC%B9%98%EB%A7%88%ED%81%AC