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 computer processors, the accelerator at saturation, submitting data processing tasks by the one or more computer 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 one or more computer processors, accelerator performance by: establishing a period of time during which the accelerator accepts a plurality of submitted tasks; and determining a throughput of accepted tasks per unit of time; and wherein measuring accelerator performance further comprises measuring accelerator performance according to 
 T=N /( t 1 −t 0 ), wherein T represents the throughput expressed as accepted tasks per second; N is a number of submitted tasks accepted by the accelerator between times t 0 and t 1 ; t 0 is the time of acceptance of the first submitted task accepted after the beginning of saturated operation of the accelerator; and t 1 is the time of acceptance of the N th submitted task.