呢D三幾個millsecond data 無用, 1 millisecond 有幾多?
A millisecond (from milli- and second; abbreviation: ms) is a thousandth (1/1,000) of a second.
100 milliseconds — the reaction speed of a human
200 milliseconds — the time it takes the human brain to recognize emotion in facial expressions
source: http://en.wikipedia.org/wiki/Millisecond
八達通response time to complete a transaction, around 200-300ms, but i feel like almost instant for us!