The CPU time is used to quantify the overall empirical efficiency of two functionally identical algorithms. CPU time and CPU usage have two main uses. Often, it is useful to measure CPU time as a percentage of the CPU's capacity, which is called the CPU usage. ![]() The CPU time is measured in clock ticks or seconds. CPU time (or process time) is the amount of time for which a central processing unit (CPU) was used for processing instructions of a computer program or operating system, as opposed to elapsed time, which includes for example, waiting for input/output (I/O) operations or entering low-power (idle) mode.
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