A method and apparatus to maintain a plurality of executables for a task in a device are described. Each executable may be capable of performing the task in response to a change in an operating environment of the device. Each executable may be executed to perform a test run of the task. Each execution can consume an amount of power under the changed operating environment in the device. One of the executables may be selected to perform the task in the future based on the amounts of power consumed for the test runs of the task. The selected one executable may require no more power than each of remaining ones of the executables.