What is the effect on the pagerank redirect

 
A few years ago Google says that Google treats redirect 3xx will be treated like a link. This statement raises the understanding that there is a reduction of points on the pagerank when a page is redirected.
But this time Google issued a new statement that there is not any reduction in the time to do redirect pagerank. Of course this is not simply a statement received by the webmaster, because of the fact that the statistics did show changes.
The reason given by Google will change that occurs is a matter of time changes. Where the system is google not change suddenly. It takes time to adjust to the changes taking place ranking.
John Mueller one trend analyst:

    Yea, I mean, any time you do a bigger change on your web site, if you redirect a lot of URLs, if you go from one domain to another, if you change your site structure, then all of that does take time for things to settle down. So we can follow that pretty quickly intervening, we can definitely forward the signals there, but that does not mean it will happen from one day to the next.
So if you want to redirect the domain or http / https please do, but you need to give it time to see a transition that is either within two weeks to two months.