Abstract: The subject disclosure is directed towards a technology in which a mobile device maintains an application in a dormant state in which the application's process is not terminated and remains in memory, but the application cannot execute code. Further, state and execution context are maintained for the application, allowing the application to be quickly and efficiently resumed into the running state. To prevent the application from executing code while dormant, thread activity is suspended, requests canceled, completed or paused, resources detached, and so forth. Resource usage may be monitored for dormant applications, to remove a misbehaving dormant application process from memory if improperly using resources.

Abstract: Aspects of the subject matter described herein relate to test execution. In aspects, a collection is obtained of tests that are configured to be executed in a primary test environment. One or more of the tests are then executed in an auxiliary test environment in parallel with executing one or more of the tests in the primary test environment. Before executing a test in the primary test environment, a check is performed to determine whether the test has already been executed in the auxiliary test environment. If it has, the test is not executed in the primary test environment and results are obtained and incorporated into the primary test environment to make it appear as if the test executed in the primary test environment.