Answer by BЈовић for Measuring the runtime of a C++ code?

You can use time to start your program. When it ends, it print nice time statistics about program run. It is easy to configure what to print. By default, it print user and CPU times it took to execute the program.

EDIT : Take a note that every measure from the code is not correct, because your application will get blocked by other programs, hence giving you wrong values^*.

^{* By wrong values, I meant it is easy to get the time it took to execute the program, but that time varies depending on the CPUs load during the program execution. To get relatively stable time measurement, that doesn't depend on the CPU load, one can execute the application using time and use the CPU as the measurement result.}