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 milliseconds have passed? The second object may be created that same minute, over the next minutes or even hours.

Answer 1

As stated already, you can operate on Time objects as if they were numeric (or floating point) values. These operations result in second resolution which can easily be converted.

For example:

def time_diff_milli(start, finish)    (finish - start) * 1000.0 end  t1 = Time.now # arbitrary elapsed time t2 = Time.now  msecs = time_diff_milli t1, t2 

You will need to decide whether to truncate that or not.