_.now()
Gets the timestamp of the number of milliseconds that have elapsed since
the Unix epoch (1 January 1970 00:00:00 UTC).
Since
2.4.0
Returns
(number): Returns the timestamp.
Example
_.defer(function(stamp) {console.log(_.now() - stamp);}, _.now());// => Logs the number of milliseconds it took for the deferred invocation.
