No other feature is more important to iPhone users than iOS's vaunted smooth performance. While some iOS releases did make our devices run slower, that has changed with iOS 10 which laid the groundworks three years ago for what would come in iOS 12 the following year: significant speed gains. iOS 13 continues on that trajectory with additional under-the-hood tweaks and optimizations that bring notable speed advances over iOS 12.
Speed and performance are at the heart of iOS 13