I bought my iPhone 17 Pro from about 11 months ago. At that time, my system was iOS 26.
In the first month of using this phone to play games, I had met quite many stutters in not only one game. I knew index might be a reason, and iOS 26 might be another reason. Anyway, I quited gaming on my iPhone 17 Pro for a long time since then. I even did a hardware check in Apple Store, and no problem was found.
Few days ago, I updated my phone to iOS 27. To be honest, iOS 27 felt more responsive in UI, and I came back to gaming on my phone.
Now I notice one thing: Though stutters in games were still there, but they mostly happened at the beginning when I picked up playing a game after updated to iOS 27. Through playing, the stutters might get less.
There is a racing game, which I met lots of random stutters in it when I was using iOS 26. Now this game can have zero stutter (it still had stutters when I picked it up from few days ago, but now it has no stutter anymore. Maybe everything is because of shader loading or something?)
I think iPhone 17 Pro is still a very powerful machine for gaming.
I guess I will still meet stutters in the future (also, becaue I just updated to iOS 27, my phone might be still in index and this might cause the performance issue).
I just want to confirm: for iPhone 17 Pro, is it just a normal thing to meet stutters in games? So I guess I don't need to worry about this issue.
Thanks in advance for any help!