Cloudsleuth is a cool tool developed by Compuware which is a real-time visualization tool providing users with a continuously updating view into the performance of cloud service providers like Amazon EC2, Google App Engine, OpSource, Microsoft Azure, Rackspace. The performance view is presented on a Map (you can also see the data in a chart or table format).

The data shown are Response Time, Availability, Reporting Windows. For more details on the Reported Metrics check out the Methodology page.

So how is this data gathered. From the Cloudsleuth Methoology page:

We deploy an identical “target” application to each cloud platform. The Gomez Performance Network (GPN) is used to run test transactions on the deployed target applications and monitor the response time and availability from various points around the globe. Hundreds of data points from each successive test run are collected and aggregated into a cloud performance database. CloudSleuth’s visualization tools enables users to visually interact with the data from the cloud performance database.

You can put your own Cloud application to the performance test. Join Cloudsleuth’s community and register your URL and you can begin receiving a daily e-mail.