Sidebar Sidebar
Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

How many do NOT experience slow downs from iOS 11?

F

firewood

macrumors G3
Original poster
Jul 29, 2003
8,142
1,386
Silicon Valley
I just installed iOS 11.2.1 on an iPhone 6s and did not experience any slow downs. Camera launches in less than 2 seconds. Keyboard is responsive. Graphics apps animate just as smoothly. Etc. Same with a family member running 11.2.1 on an old iPhone 5s.

Is anyone else here NOT seeing a significant performance degradation after installing 11.2 on an old iPhone?
 
  • Like
Reactions: geekiemac
Same here on my iPhone 6S Plus (>2 years old, 537 charge cycles, battery health ca. 76%). I did have some lags (notably with the keyboard) on the first two versions of iOS 11 but nothing since iOS 11.2. Geekbench results are above average, which confirms my overall feeling. :cool:
 
  • Like
Reactions: jpn
iOS 11.2.1 has absolutely no lag on my 6s.
after every incremental update to iOS11 my 6s has performed better and better.
 
firewood said:
I just installed iOS 11.2.1 on an iPhone 6s and did not experience any slow downs. Camera launches in less than 2 seconds. Keyboard is responsive. Graphics apps animate just as smoothly. Etc. Same with a family member running 11.2.1 on an old iPhone 5s.

Is anyone else here NOT seeing a significant performance degradation after installing 11.2 on an old iPhone?
Click to expand...

What does your setup look like?
Know a young lady whose 6S+ slowed down. Another with a 5S who is having slowdown and iMessage issues (upon to 5 sec lag)
 
Rhonindk said:
What does your setup look like?
Know a young lady whose 6S+ slowed down. Another with a 5S who is having slowdown and iMessage issues (upon to 5 sec lag)
Click to expand...

Try going through the standard checks, in this order:
  1. Make sure there's at least 20% free storage
  2. Leave the phone on the charger (but running) an extra hour or more past 100%
  3. Kill all background Location and audio/music apps (including sneaky ones like Facebook)
  4. Turn off auto-update and any un-needed Notifications and apps in Background App Refresh Settings
  5. Put the phone in Airplane mode and reboot it (Slide to Power off, wait a couple minutes, then power on)
  6. Check performance of using apps (Camera, keyboard, etc.) before turning off Airplane mode and connecting to WiFi
If you turn off Airplane mode and the iPhone starts to slow down, something (Mail?, iCloud?, iMessage?) might be doing tons of downloads in the background. A friend of mine had like 10,000 unread emails and iMessages that were slowing down her iPhone while they kept trying to download. She did a bunch of mass deletes, and her slowdown problems gradually reduced.

Also, check Battery Usage. Whatever is draining the battery might also be contributing to slowing things down if left running.

Please post results here if any of this helps fix the slow downs.
 
Last edited:
  • Like
Reactions: Vampire14
firewood said:
Try going through the standard checks, in this order:
  1. Make sure there's at least 20% free storage
  2. Leave the phone on the charger (but running) an extra hour or more past 100%
  3. Kill all background Location and audio/music apps (including sneaky ones like Facebook)
  4. Turn off auto-update and any un-needed Notifications and apps in Background App Refresh Settings
  5. Put the phone in Airplane mode and reboot it (Slide to Power off, wait a couple minutes, then power on)
  6. Check performance of using apps (Camera, keyboard, etc.) before turning off Airplane mode and connecting to WiFi
If you turn off Airplane mode and the iPhone starts to slow down, something (Mail?, iCloud?, iMessage?) might be doing tons of downloads in the background. A friend of mine had like 10,000 unread emails and iMessages that were slowing down her iPhone while they kept trying to download. She did a bunch of mass deletes, and her slowdown problems gradually reduced.

Also, check Battery Usage. Whatever is draining the battery might also be contributing to slowing things down if left running.

Please post results here if any of this helps fix the slow downs.
Click to expand...

On a 7+ and been through this. Same settings as 10.3.3. Dive to crash issues, working with Apple did a complete reset and manual reload. Nothing stands out but I only get about 70% of what I did under 10.3.3. Correspondingly the device is slower. Slower than animations from 11 account for. Apple was scratching their heads too.

I could do all the mass deletes but while this may give me a bit more battery, a bit more speed, it is no change from my settings in 10.3.3. That is the point. Don’t get why. Did have to reset my Keyboard dictionary to correct a delay/incorrect correction issue.

Thanks for the suggestions. I’ll keep picking away.

As for the 5S, has been through a total rest. The more she adds to calendar, email, iMessage, the slower it seems to get and the bigger the delays on open (camera / iMessage).

I will pass this on to the 6S+ owner.
 
Rhonindk said:
As for the 5S, has been through a total rest. The more she adds to calendar, email, iMessage, the slower it seems to get and the bigger the delays on open (camera / iMessage).
Click to expand...

One hypothesis is that iOS 11 is wasting a ton more time and effort (up to 50% of the CPU?) trying to upload/download stuff to/from iCloud/iMessage/etc., than iOS 10 did, even with the exact same settings.

A quick temporary fix, if you don't want to disable iCloud/iMessage, might be to try putting the phone in Airplane mode when using apps that don't need iCloud or the web. I wonder it that could makes a difference?
 
firewood said:
I just installed iOS 11.2.1 on an iPhone 6s and did not experience any slow downs. Camera launches in less than 2 seconds. Keyboard is responsive. Graphics apps animate just as smoothly. Etc. Same with a family member running 11.2.1 on an old iPhone 5s.

Is anyone else here NOT seeing a significant performance degradation after installing 11.2 on an old iPhone?
Click to expand...
Your phone, being a 6s, could have already been affected since iOS 10.2 days essentially, 11.2(.1) wouldn't really change anything in relation to it.
 
C DM said:
Your phone, being a 6s, could have already been affected since iOS 10.2 days essentially, 11.2(.1) wouldn't really change anything in relation to it.
Click to expand...

Except I've measured no slow downs from how fast it ran when it was new in Sept 2015, running iOS 9.
[doublepost=1514008515][/doublepost]DaringFireball has another suggestion: a full iTunes backup and restore of the slow iPhone:

https://daringfireball.net/
http://mglenn.com/blog/2017/12/22/apples-bungled-battery-feature

The hypothesis here is that the iOS 11 update leaves something old behind that eats processor time.
 
firewood said:
Except I've measured no slow downs from how fast it ran when it was new in Sept 2015, running iOS 9.
[doublepost=1514008515][/doublepost]DaringFireball has another suggestion: a full iTunes backup and restore of the slow iPhone:

https://daringfireball.net/
http://mglenn.com/blog/2017/12/22/apples-bungled-battery-feature

The hypothesis here is that the iOS 11 update leaves something old behind that eats processor time.
Click to expand...
What I'm saying is that iOS 11 wouldn't introduce anything new as far as this power management throttling goes for a phone such as the one you have as that was already there since iOS 10.2 days.
 
  • Like
Reactions: dk001
firewood said:
Except I've measured no slow downs from how fast it ran when it was new in Sept 2015, running iOS 9.
Click to expand...

Your post leaves me scratching my head ...
When this issue came out, being engineers, at work those of us with iPhones who did not get an 8/X have all really looked at our devices. Work requires us to be at 11.1 or greater to connect to work systems.
We all have slowdowns though not all in the same scale and some type of whacky app issue be it auto-correct, Safari issues, or other problems that’s were not present on 10.3.3. Some of us are Facebook users, some Twitter, some both and some neither. We are all Office users, have multiple calendars, emails, etc...

Hope Apple figures this out.

Something strange is going on with 11 ...
 
Another perhaps possible reason why my 6s does not appear to have slowed down: I first backed it up. Then completely erased it (all data and settings). Then did the iOS 11 update. Afterwards I restored my iCloud data to it, one service at a time.
 
firewood said:
Another perhaps possible reason why my 6s does not appear to have slowed down: I first backed it up. Then completely erased it (all data and settings). Then did the iOS 11 update. Afterwards I restored my iCloud data to it, one service at a time.
Click to expand...
It seems that only some (at most) devices would get affected by power management throttling.
 
I've seen no noticeable performance drop on my SE, my daughter's SE or my wife's 7.
There are still plenty of bugs and glitches though...
 
cyb3rdud3 said:
Belief your own experience ;)

I bet that the vast majority wouldn't even have noticed anything in real-world usage unless using arbitrary benchmark apps.
Click to expand...
Well, I noticed my 5s slow down with 10.0, and thought it was just because it had an older processor and couldn't open maps and messages as fast. That would have nothing to do with the power management in 10.2.1 (supposedly), but it was still noticeable.

Yet I don't notice any slowdown when engaging low power mode, never have... so there's that: low power mode is different than power management mode?

My wife, as one of your "most", is fine with the slow 5s opening speed on 10.3.3. Keyboard is fine, and there isn't any stutters. The only bad thing is that she says it will turn off sometimes around 30% battery, and has some color skewing around the edge of the screen (which still doesn't bother her).

I'm very close to updating to 11, but there's no return if the experience isn't enjoyable, though this thread is an example of why there shouldn't be anything to be afraid of.
 
C DM said:
It seems that only some (at most) devices would get affected by power management throttling.
Click to expand...

So a good question is what’s different about the old iPhones that don’t slow down after installing iOS 11?

I can’t imagine that a many-year-old iPhone was used so little that the battery still has the same mAH capacity as when new. There could be another difference.
 
firewood said:
So a good question is what’s different about the old iPhones that don’t slow down after installing iOS 11?

I can’t imagine that a many-year-old iPhone was used so little that the battery still has the same mAH capacity as when new. There could be another difference.
Click to expand...
Right, it's not simply about battery capacity or age basically.
 
  • Like
Reactions: dk001 and firewood
I have never experienced the battery throttling, but I get a new iPhone every year.

6 6S Plus 7Plus X
[doublepost=1514055368][/doublepost]I do not mind the idea of throttling because of poor battery performance, but I believe that iOS should warn you so that you can make an intelligent choice about whether to replace the battery or get a new iPhone.
 
  • Like
Reactions: eyeseeyou and dk001
You must log in or register to reply here.
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.
Top Bottom
Back