Testing a web application within your own network is not as rigorous for the application as testing from a real cloud. The simulated traffic generated from within your own network would have direct access to the application and may result in biased response times. However once your web application or site turns live it’ll receive traffic from across different geographies unlike the traffic from your internal network. Hence testing on the cloud gives far more realistic performance results.

Testing on the cloud also cuts down the costs involved and removes the need to buy bulky hardware and complex software for the testing process. Tests can be scheduled for different times with varying traffic from multiple locations.

These tests can be configured/setup from any location globally with the online user id and password without the need of being present at a particular location.

Testing on the cloud is also easily customizable. Testers can emulate end user environment and perform load and performance tests in various combinations like different Operating systems, browsers, configurations etc.

Scalability is yet another benefit the cloud has to offer. Computing resources can be scaled up or down as required without a drastic increase in costs. These are helpful for applications which have seasonal demand and their visitor base keeps altering frequently.