Stop making everything animated or translucent?
Also, I remember the calculator app being unreliable due to animations: https://www.macrumors.com/2017/10/24/ios-11-calculator-anima...
Is this not a legitimate problem?
† The google feed seems to have a consistent lag upon switching to it from the home screen (double tap on the multitasking button is normal) that the animations hide. It loads somewhere around 150ms slower than most applications, even taking longer than the first launch for unused apps.