Tried running ArcGIS Runtime SDK for iOS samples from the GitHub with XCode 9 GM Seed and iOS 11, the map rendering performance is really slow. If I try to zoom in/out or browse around my location the rendering animation is killing UX.
Unfortunately we've been experiencing the same thing. It's a bug that apple is aware of and seemingly getting a lot of people wanting it fixed: iOS 11 Simulator unusable slow | Apple Developer Forums
Thank you for pointing the root cause. At least it should work on the real device then, which is main priority.
Retrieving data ...