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

iOS15 photo app makes my iPhone warm

Tabbit2002

Tabbit2002

macrumors member
Original poster
Mar 5, 2016
88
14
Does anyone is using ios15, which finds your photo app making your phone a bit warm after several minutes?

Browsing photo should consume less battery than using Safari, which I find it is opposite in my case.

P.S. using iPhone 13 Pro with more than 1 week, no iCloud photo on btw
 
Today I noticed the exact same thing on iPhone 13 pro. I'm a developer so naturally I plugged my phone into the CPU monitor to get a closer look. The CPU is being blasted when opening / viewing photos:
Screenshot 2021-10-04 at 15.34.36.png


Compared to the camera which I imagine is much more intensive. You can see here the processes in that time frame, and mediaservrd is hammering the CPU.
Screenshot 2021-10-04 at 15.35.44.png


This must be a bug. I tried turning HDR off but no dice.
 
  • Like
Reactions: ShaneSparkyYYZ and Tabbit2002
I think this service is responsible for decoding images and videos but seems kind of insane that it would be that CPU intensive to decode a photo. I also notice there is a "pop in" of a higher quality image when you open a photo. I can only assume this is a bug.
 
  • Like
Reactions: Tabbit2002
I debugged my partners iPhone 11 on iOS 14.8 and you can clearly see it does not hammer the CPU nearly as much:
Screenshot 2021-10-04 at 16.43.10.png


My iPhone 13 pro (iOS 15):
Screenshot 2021-10-04 at 16.45.19.png
 
When the phone is plugged in to monitor CPU usage, it's also receiving power and charging. There's a good bet that that iOS is analyzing photos for content recognition, like for text recognition and when you type in "cat" it shows you all the cats you've photographed, etc.

It would be interesting to see if this CPU usage still happens when not charging.
 
zorinlynx said:
When the phone is plugged in to monitor CPU usage, it's also receiving power and charging. There's a good bet that that iOS is analyzing photos for content recognition, like for text recognition and when you type in "cat" it shows you all the cats you've photographed, etc.

It would be interesting to see if this CPU usage still happens when not charging.
Click to expand...
My device gets as hot when it is not plugged in. Also you can see that the "mediaserverd" process is the cause of the high CPU usage which from my understanding handles decoding images. I've reached out to Apple for a response.
 
Thats an effort paid for this investigation.
Thank you and I wish they fix this bug asap🙂
 
seems iOS 15.0.1 fixed this issue, as I don't feel warm anymore after updating.
May try it out and see if interested
 
Tabbit2002 said:
seems iOS 15.0.1 fixed this issue, as I don't feel warm anymore after updating.
May try it out and see if interested
Click to expand...
I updated to 15.0.1 and I still have the issue. Try opening a lots of photos in a row within the app. Gets warm very quickly.
 
May I also know what kind of apps you are using to monitor the CPU usage of iPhone like above?
 
I may ask for your help again to check, once iOS 15.1 is out.

Once again thank you so much
 
alexfoxy said:
It’s a developer tool. You have sign up to be an Apple Developer to use it which is unfortunately not free!
Click to expand...
Have you updated to 15.1 RC yet? Are you okay to help tested it out and see if it is fixed? ;)
 
I have a 13 Pro Max using 15.0.2. My phone stays pretty much cool when I am using the photos app. I tried playing videos and flipping through photos. Does not even get warm to the touch.
 
  • Like
Reactions: Tabbit2002
Taz Mangus said:
I have a 13 Pro Max using 15.0.2. My phone stays pretty much cool when I am using the photos app. I tried playing videos and flipping through photos. Does not even get warm to the touch.
Click to expand...
Mine still exhibits the behaviour. I just have to open and close around 10 photos (make sure they are HDR) and then feel the left side of the screen by the volume buttons.
 
Taz Mangus said:
:pI have a 13 Pro Max using 15.0.2. My phone stays pretty much cool when I am using the photos app. I tried playing videos and flipping through photos. Does not even get warm to the touch.
Click to expand...
Good to hear that you are not suffering.
 
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