processing time the time it takes to complete a prescribed procedure; "they increased output by decreasing processing time"
access time (computer science) the interval between the time data is requested by the system and the time the data is provided by the drive; "access time is the sum of seek time and rotational latency and command processing overhead"
overhead -
the expense of maintaining property (e.g., paying property taxes and utilities and insurance); it does not include depreciation or the cost of financing or income taxes
overhead -
data or steps of computation that is only used to facilitate the computations in the system and is not directly related to the actual program code or data being processed.