vCloudPerformer is a FREE cloud load testing tool that is used to measure the performance, scalability and load stress capacity of web applications by utilizing load servers on the Amazon EC2 cloud. vCloudPerformer will show you how well your application responds when it is subjected to a large concurrent user load running in the cloud. vCloudPerformer provides you the tools to rapidly create performance testing scripts that model the typical user interactions with your web application. You can then simulate loads of thousands of concurrent virtual users against these performance testing scripts that are run in the cloud

vCloudPerformer is a performance testing tool that is capable of instantaneous large-scale virtual load generation in the cloud that would often be too costly and time consuming for you to setup internally. Dynamic load generation allows you to test against any number of virtual users, and pay only for the time your tests are running. The vCloudPerformer Cloud realistically models user traffic by enabling you to run vCloudPerformer Load Agents at different locations around the globe.

Benefits
* A simple, easy to use interface based on point-and-click operations significantly lowers the learning curve.
* Does not require a development background. JavaScript is however fully supported and performance test engineers with a development background can use JavaScript for scripting.
* vCloudPerformer can simulate thousands of virtual users while placing an insignificant load of its own. Performance testing engineers, without any programming expertise, can comprehensively test the performance characteristics of their web applications.
* Allows you to instantly provision load servers on the cloud at any scale and any where in the world allowing highly accurate, scalable, and affordable performance testing
* Develop customized, data-driven and modular web performance testing scripts for a highly productive testing process.