Although cloud computing can alleviate some of the constraints of a mobile device, beware of latency and the differences between clouds. In a report published by Bitcurrent (now CloudOps), the performance of ten cloud providers was analyzed. They include Amazon, Salesforce, Google, and Rackspace. Providers were selected based on the ease of setup and the absence of long-term contracts. The tests were run over a month-long period with a generic mobile site using Neustar web performance services.
Findings indicate that smaller, leaner sites had an advantage. However, there is a limit to how small a site can get before its bandwidth advantage disappears. Fast response time and caching content is more important than bandwidth spending. Also, there is seasonality to the Internet, something to consider when doing capacity planning. Lastly, performance varies from region to region, so it’s important to test at various locations to identify any problems.
You can access the report for more detailed findings.