Question

How to get the CPU time spent on a code block in C

Answer 1

#include <stdio.h>
#include <time.h>

int main()
{
    clock_t start_t = clock();

    for (int i = 0; i < 30000000; i++) {}

    clock_t end_t = clock();

    double total_t = (double)(end_t - start_t) / CLOCKS_PER_SEC;
    
    printf("Total CPU time = %f seconds", total_t);

    return 0;
}




/*
run:

Total CPU time = 0.039000 seconds

*/

 

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