How to understand the output of time command?

Question

I am trying to figure out the performance of my code, but I do not understand the output of the time command, Can anybody please explain what does time command outp

Answer 1

'real' is the amount of clock time it took. If you were to time it with a stopwatch, that's what you'd get.

'user' is the amount of CPU time that the process itself used.

'sys' is the amount of CPU time that the kernel spent on behalf of the process.