Test shows how much the iOS 12 public beta can speed up an older iPhone

When Apple announced iOS 12 at its developer conference earlier this month, there was an unusual lack of new features to show off. This year, we aren't getting many fancily redesigned apps, new lock screens, or any of the major visual changes that iOS updates normally bring. Instead, Apple is pushing one feature above all else: Performance. iOS 12 is supposed to be notably faster than previous versions of iOS, and not just on the iPhone X and iPhone 8. Apple is supporting iPhones all the way bac...