The wide range of industries and employment means it does not boom as much as Perth but does not slow down as much either, it is a more amortised growth over the decades.
Speaking generally, Melbourne Metro has outgrown all other cities over the past 100 years. According to Jan Somers' book Melbourne metro has averaged 13.5% compounding over the past 100 years whereas Sydney metro has averaged 12.5% compounding.
I would be happy to see if anyone can confirm/deny Ms.Somers' data as I have not found 100 year data for the two cities. It seems an extraordinary growth figure for such a length of time, I would love to see how accurate it really is.