Hi, i think this issue is more for the *ngFor directive, as we try to display large items in a list, this takes some time to instantiate the dom elements that will hold the values of the variables, ngMaterial had a way to deal with it with virtual-repeat but i think the code isn't compatible with angular 2, ionic 1 has some sort of solution to this inside their ion-list directives, and even angular 1 had something to deal with it with the track-by filter or something.
Will ionic 2 make something soon about this performance issue? i'm getting at least 5 sec delay while it shows a simple list with 240 items with just a name.