How can I find the execution time of a section of my program in C?

Question

I\'m trying to find a way to get the execution time of a section of code in C. I\'ve already tried both time() and clock() from time.h, but it seems that time() returns seco

Answer 1

gettimeofday() provides you with a resolution of microseconds, whereas clock_gettime() provides you with a resolution of nanoseconds.

int clock_gettime(clockid_t clk_id, struct timespec *tp);

The clk_id identifies the clock to be used. Use CLOCK_REALTIME if you want a system-wide clock visible to all processes. Use CLOCK_PROCESS_CPUTIME_ID for per-process timer and CLOCK_THREAD_CPUTIME_ID for a thread-specific timer.