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iOS 15 makes iPhone XS feel overall sluggish

MrInquestador

MrInquestador

macrumors regular
Nov 14, 2015
229
52
ricardoriquier said:
Hey there,

My XS feels overall sluggish and slower since I updated to iOS 15. Typing feels somewhat laggy, the animation of going from locked screen to main screen drags a bit, the gesture to expose all open apps sometimes gets a bit ‘stuck’, etc.

Anyone else experiencing this? I’ve had the new iOS for a week now.
Cheers
Click to expand...
well, my 4-year old iPhone X is perfectly fine.
 
S

Sorig

macrumors 6502
Nov 2, 2017
316
249
My 11 Pro 64gb still runs like new on 15.1.

My battery health is reported at 94% in settings.
Coconut battery shows the real capacity is at 92% though. So if your battery is showing in the 80s then it’s probably even worse and throttling the system.
 
djgade

djgade

macrumors member
Oct 14, 2021
36
21
Sorig said:
My 11 Pro 64gb still runs like new on 15.1.

My battery health is reported at 94% in settings.
Coconut battery shows the real capacity is at 92% though. So if your battery is showing in the 80s then it’s probably even worse and throttling the system.
Click to expand...
Mine is at 84%. But the stutter only occurs when RAM is full! Not when cpu on high load.
 
S

Sorig

macrumors 6502
Nov 2, 2017
316
249
djgade said:
erase all contents and settings. Is there really a difference when Restoring IPSW?
Click to expand...
Yes, there is a difference. Restoring from a computer with the ipsw and setting up as new (do not restore from a backup) is the only real way to wipe the iPhone clean.

There is no guarantee it will fix your issue, but it's worth a try.

And at 84% battery health you bet you have some throttling going on.
 
slyronit

slyronit

macrumors 6502
Apr 7, 2020
382
327
djgade said:
I have also the 256 GB Version. Already tried a factory reset via settings. The first hour of use was really fast but after having the ram full of used apps the animations begin to have those short hickups after app close and open.
Click to expand...
That's not something that happens on iOS.
 
Astero

Astero

macrumors newbie
Sep 13, 2020
8
1
Sorig said:
Yes, there is a difference. Restoring from a computer with the ipsw and setting up as new (do not restore from a backup) is the only real way to wipe the iPhone clean.

There is no guarantee it will fix your issue, but it's worth a try.

And at 84% battery health you bet you have some throttling going on.
Click to expand...
Tried that too. Still stutters
 
Astero

Astero

macrumors newbie
Sep 13, 2020
8
1
Looks like its a "pro motion" thing. When you swipe images in app store - they stutter, and are fine when it adapts. Kinda same with opening apps. When you open same app multiple times it's temporary fine.
 
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dreador

dreador

macrumors newbie
Feb 24, 2018
4
2
Same issue on my XS max. On iOS 14 perfectly smooth. Since 15 and 15.1 all the way lagging apps on closing animation. This is driving me nuts 🤬
 
D

Deliro

macrumors 65816
Sep 20, 2011
1,143
1,337
bluecoast said:
I’ve got an XR - the A12 too of course - and it’s the same for me as the OP reports:
  • Sluggish performance throughout the entire system
  • Recently unused apps seem to have to reload from the SSD cache more (on making then the active app again)
  • Safari in particular seems very slow.
  • BTW Safari is a UX disaster too IMHO with virtually every action harder to get to than before. Private browsing was easy to access before - now it’s 4 touches away by my count. One of my favourite and most essential iOS apps has basically been ruined.
I put up with this for 48 hours and reverted back to 14.8. My phone is again fast and snappy.

I’m not going near 15 anytime soon. I thought that 11 & 13 were bad releases but this is a new low. And the Safari rework makes Safari worse - as in terrible - in nearly every aspect.
Click to expand...

Perhaps you’re doing it wrong? One long press on the tab switcher brings up the menu to private. New safari is fine for me.
 
dreador

dreador

macrumors newbie
Feb 24, 2018
4
2
Smb tried 15.2 beta? Any changes on that? Revertig to 14.8 isn't possible anymore :/
 
I

ian6969

macrumors member
Dec 31, 2019
78
56
bluecoast said:
It’s really weird how there are conflicting reports on older phones ie I had a bad experience on my XR.

Did you factory reset and install? Or do an OTA update?
Click to expand...
I do a complete DFU wipe and fresh reinstall every year when the new iOS is released. Then set up as new (no rebuilding from backups), sign in to iCloud, and let my files and app data stream back. You do have to download your apps and sign into those, but I find the majority of my passwords are auto filled by Key Chain so its no issue. I can do the whole process in about an hour - while watching TV - and I know I'll have a phone that is as "clean and fresh" as possible. My partner did a regular upgrade in place (same iPhone model) via the iPhone system settings - this took about three hours!
 
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bluecoast

macrumors 68020
Nov 7, 2017
2,256
2,673
ian6969 said:
I do a complete DFU wipe and fresh reinstall every year when the new iOS is released. Then set up as new (no rebuilding from backups), sign in to iCloud, and let my files and app data stream back. You do have to download your apps and sign into those, but I find the majority of my passwords are auto filled by Key Chain so its no issue. I can do the whole process in about an hour - while watching TV - and I know I'll have a phone that is as "clean and fresh" as possible. My partner did a regular upgrade in place (same iPhone model) via the iPhone system settings - this took about three hours!
Click to expand...
Thanks for the tip. I agree with your new version of iOS strategy 100%.

I did however install iOS 15 onto 14.8 (a 3 weeks old post DFU wipe installation).

It's going OK and iOS 15.1 seems much better than my original upgraded 15.0 installation (onto a year+ 14.8).

Apart from...

I do think that the new Safari UI is strangely unoptimised. Firefox on 15.1 is as snappy as ever but Safari seems to pause a fraction of a second whenever there's a UI animation.

2021 has not been a good time for the Safari UI - it's been its 'butterfly keyboard' moment.

You can always fix software - at least that's what I hope that Apple is working on.
 
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