precise time measurement

Question

I\'m using time.h in C++ to measure the timing of a function.

clock_t t = clock();
someFunction();
printf(\"\\nTime taken: %.4fs\\n\", (float)(clock() - t)/         


        

Answer 1

In C or C++ I usually do like below. If it still fails you may consider using rtdsc functions

      struct timeval time;
      gettimeofday(&time, NULL); // Start Time

      long totalTime = (time.tv_sec * 1000) + (time.tv_usec / 1000);

          //........ call your functions here

        gettimeofday(&time, NULL);  //END-TIME

        totalTime = (((time.tv_sec * 1000) + (time.tv_usec / 1000)) - totalTime);