Best timing method in C?

c, performance, timer, timing

Solution

I think this should work:

#include <time.h>

clock_t start = clock(), diff;
ProcessIntenseFunction();
diff = clock() - start;

int msec = diff * 1000 / CLOCKS_PER_SEC;
printf("Time taken %d seconds %d milliseconds", msec/1000, msec%1000);

Problem

What is the best way to time a code section with high resolution and portability? ``` /* Time from here */ ProcessIntenseFunction(); /* to here. */ printf("Time taken %d seconds %d milliseconds", sec, msec); ``` Is there a standard library that would have a cross-platform solution?

Original source