Need help to time algorithms in C (msec/usec accuracy)

[jisrar]

Hi,

I have written two algorithms and need to be compare them in terms of how long each take. I have tried clock() before/after each algorithm but my CLOCKS_PER_SEC variable is defined as 1000 which only gives me accuracy upto 1 msec. I have alo tried time() but this is accurate upto 1 sec. I have tried _ftime() and accessed the msec part but again I am not sure if this is accurate. In some cases I am getting same sec/msec values before and after my algorithm.

What is the best way of determining execution time which is at least semi-reliable and is accurate utp usec level.

Thanks in advance for your help.

Regards,

Junaid.

[weaknessforcats]

You could run the program 100,000 times and divide your elapsed time by 100,000, for example.