perl load testing   (link)

http://stein.cshl.org/~lstein/torture/
The current incarnation of the script requires Perl 5.004 or higher, and the Time::HiRes module, available at CPAN. It uses the fork() call to spawn multiple copies of itself so that it may simulate multiple users. Unfortunately this means that the script will only run on Unix ports of Perl. A multithreaded version that works on Windows systems is not yet complete (volunteers, anyone)?