Question

Some loading routines in my program takes to long to complete. I want a quick small snippet for checking how long a function took to execute. By small I mean ‘preferably without 3rd party libraries’.

Maybe something as simple as taking the system time?

start = current_system_time() load_something() delta = current_system_time()-start log_debug('load took '+delta) 

Edit: Target OS in question is Windows.

Answer 1

Your answer: Yes

Caveat: That WON’T work in multihtreaded code or multiple core machines, you need a robust wall-clock timer. So I recommend you use omp’s wallclock. OMP is included with VC and GCC, and most compilers and its a standard you don’t need to worry about disappearing

#include <omp.h>  // Starting the time measurement double start = omp_get_wtime(); // Computations to be measured ... // Measuring the elapsed time double end = omp_get_wtime(); // Time calculation (in seconds)