Using ComponentWillMount instead of ComponentDidMount ?

[CheragV]

Hi I am new to Firebase and I am trying to understand this project. One thing that clicked me while I was going through it was will using ComponentWillMount instead of ComponentDidMount cause any performance changes in the long run, I mean with a list as small as 10-20 members it might not be such a difference but with a larger list will there be a difference in rendering of items ?

BTW very helpful blog @davideast
Thanks !!