Abstract: In one implementation, a profiling system can comprise an instrumentation engine, a script engine, a distribution engine, and a monitor engine. The instrumentation engine can add profile functionality to a client application. The script engine can provide a test script for the synthetic client. The distribution engine can send the client application with the profile functionality to a synthetic client. The monitor engine can receive messages from the profile functionality. In another implementation, a method for profiling a client application can comprise distributing a client application to a synthetic client to execute a test script on the client application, receiving client profile information from the synthetic client, and analyzing the client profile information based on a quality threshold.