I thought this had been tested recently and shown not true? A psychological illusion or something? I’ve never noticed any significant, let alone dramatic, speed change on any given device from iOS 3 on the original iPad onwards.
They tested the performance of the hardware (CPU, GPU, etc), not of the APIs or updated apps.
So the CPU and GPU of my iPhone 6 are just as fast as when they were released. But I can guarantee you that the camera app as well as a lot of third party apps aren't as fast as they were when I bought the phone.
Apps that represent light websites like Google and Facebook are now 300mb+. With such memory hogging updates, few people with older phones are going to update.
Older hardware has older chips (and possibly slower memory) so... a larger size alone would still likely have an actual processing speed impact, no? The newer OS and app versions are developed with chip/memory speed "XYZ" in mind, and that's the target they aim for. That the OS does run on older hardware is great, but if your memory size goes up 2-3 times for apps, I can not imagine that there's 0 speed impact.
I thought it was a myth too, but iOS 11 is undeniably much slower for me. And I don't understand why, as it doesn't seem like it adds many features. There's a new filesystem, but shouldn't that be faster, not slower?
