Source : WordNet®

throughput
     n : output relative to input; the amount passing through a
         system from input to output (especially of a computer
         program over a period of time)

Source : Free On-Line Dictionary of Computing

throughput
     
        1. The rate at which a processor can work expressed in
        instructions per second or jobs per hour or some other unit of
        performance.
     
        2.  {data transfer rate}.
     
        (2001-05-22)