LoadRunner by HP is a load testing tool that predicts system behavior and performance. It exercises an entire enterprise infrastructure by emulating hundreds, even thousands of users and employs performance monitors to identify and isolate problems.
SilkPerformer by Borland is a powerful, yet easy to use, enterprise-class load and stress testing tool. SilkPerformer allows you to thoroughly test your enterprise applications' reliability, performance, and scalability before they are deployed - regardless of their size and complexity.
