I was surprised when Apple announced that iOS 7 would run on 2010’s iPhone 4, mostly because the OS seemed to make use of graphical effects, transitions, and animations that looked like great candidates for poor performance and hiccups. Indeed, iOS 7 on the iPhone 4 (and to an extend, the iPad 3) was, in my experience, insufferable: animations were slow, scrolling would often drop frames and stutter, and everything felt generally sluggish.

Ars Technica’s Andew Cunningham has run tests to measure the speed improvements of iOS 7.1 on the iPhone 4. The changes are noticeable, but, more importantly, the update makes the OS fluid and snappy – usable, at least. iOS 7.1 cuts the execution time of animations on all iOS devices, but the difference for the iPhone 4 is even more apparent.

It is a good thing that Apple is still supporting a four year-old device with the latest version of iOS (albeit with missing features), and I’m glad that iOS 7’s possibly one and only major update focused on making performance acceptable on older devices for the future.