How do I get elapsed time in milliseconds in Ruby?

Question

If I have a Time object got from :

Time.now

and later I instantiate another object with that same line, how can I see how many

Answer 1

DateTime.now.strftime("%Q")

Example usage:

>> DateTime.now.strftime("%Q")
=> "1541433332357"

>> DateTime.now.strftime("%Q").to_i
=> 1541433332357