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

I think the answer is incorrectly chosen, that method gives seconds, not milliseconds.

t = Time.now.t­o_f
=> 1382471965.146

Here I suppose the floating value are the milliseconds