Context Switch - The only operation that kills productivity
In computing, a context switch is the process of storing the state of a process or of a thread, so that it can be restored and execution resumed from the same point later. This allows multiple processes to share a single CPU, and is an essential feature of a multitasking operating system. — Wikipedia See, a single core CPU can not multitask. It is all a lie. What really happens when single core CPU multitasks, is that it runs small parts of each program for a small period of time.
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