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real user sys time shell

• real: The actual time spent in running the process from start to finish, as if it was measured by a human with a stopwatch
• user: The cumulative time spent by all the CPUs during the computation
• sys: The cumulative time spent by all the CPUs during system-related tasks such as memory allocation.

> Notice that sometimes `user + sys` might be greater than `real`, as multiple processors may work in parallel.
 
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Tagged: #real #user #sys #time #shell
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