1. A method of performance measurement of hardware accelerators in a computer, the computer comprising one or more computer processors operably coupled to at least one hardware accelerator, the method comprising: operating by the one or more processors the accelerator at saturation, submitting data processing tasks by the processors to the accelerator at a rate that saturates the data processing resources of the accelerator, causing the accelerator to decline at least some of the submitted tasks; and while the accelerator is operating at saturation, measuring by the processors accelerator performance according to a period of time during which the accelerator accepts a plurality of submitted tasks.