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Siege is a free and open source regression test and benchmark utility that lets Web designers measure the performance of their code under a heavy load of hits. 'Siege' lets the user hit a server with an adjustable number of concurrent users, thus placing the server "under siege." It can stress test a single URL with a user defined number of simulated users, or it can read many URLs into memory and stress them simultaneously. The program reports the total number of hits recorded, bytes transferred, response time, concurrency, and return status. Most features are configurable with command line options, which also include default values to minimize the complexity of the programs's invocation.


User manual available from


version 2.63b3 (beta)
released on 20 May 2005



LicenseVerified byVerified onNotes
GPLv2Janet Casey17 January 2001

Leaders and contributors

Jeffrey Fulmer Maintainer
Peter J. Hutnick Contributor

Resources and communication

Audience Resource type URI
Bug Tracking,Developer,Support Homepage

Software prerequisites

Kind Description
Required to build autoconf
Source requirement openssl (to support https protocol)
Required to use Perl

This entry (in part or in whole) was last reviewed on 22 April 2005.


Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the page “GNU Free Documentation License”.

The copyright and license notices on this page only apply to the text on this page. Any software or copyright-licenses or other similar notices described in this text has its own copyright notice and license, which can usually be found in the distribution or license text itself.

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