Pardon my ignorance, how do we calculate current time A in microseconds and then calculate current time B (differ from A) in microseconds and finally check the difference in microseconds?? 
$time_a = (current time in microseconds)
$time_b = (after current time in microseconds)
$time_c = $time_b - $time a (time in microseconds)

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yes, i know there are function about this, but i still could see it properly..

In reply to Simple time differences in microseconds by cik_ail

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