iOS 11 public beta 1 was launched by the Apple company for iPhone and iPad, the other days developers and users could install the operating system update. Unfortunately, iOS 11 public beta 1 is not really the best beta ever released by Apple for iPhone and iPad, so you have to be careful.
It was expected that iOS 11 public beta 1 would not run smoothly on iPhone or iPad, and this turns out to be true, as you can see. Performance of iOS 11 public beta 1 compared to that of iOS 10.3.2 is bad, many blockages exist in the daily use of iPhone or iPad terminals with the new version of the operating system.
For the iPhone 5S, we are talking about a serious regression in performance on iOS 11 public beta 1 compared to iOS 10.3.2, so if you are thinking of installing it, you know what to expect. iPhone 5S will have iOS 11 public beta 1 as the last major version for which Apple will offer updates, so it is normal that its performance is not even among the best.
Of course, if iOS 11 public beta 1 has poor performance on the iPhone 5S now, this does not mean that in the final version things will be the same, Apple being able to modify the performance until then. In general, the first beta versions of an operating system offer the worst performance, but things change until the final version is released, and the same thing will happen with iOS 11.
