linux time command microseconds or better accuracy

Question

I wish to know the amount of time taken for execution of a program under linux in microseconds (or better accuracy). Currently I am using the time command, but it gives me at the max milliseconds accuracy. Is there some way to tweak the time command to give better accuracy or is there some other command for the same?

Answer 1

Your question is meaningless: you will not get repeated measurements even within milliseconds time does report.

Adding more digits will just add noise. You might as well pull the extra digits from /dev/random.