nsec

Returns the number of nanoseconds for time.

t = Time.now        #=> 2007-11-17 15:18:03 +0900
"%10.9f" % t.to_f   #=> "1195280283.536151409"
t.nsec              #=> 536151406

The lowest digits of #to_f and #nsec are different because IEEE 754 double is not accurate enough to represent the exact number of nanoseconds since the Epoch.

The more accurate value is returned by #nsec.