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Comment by secretsatan | Hacker News Reader

I have a 15 pro here for testing, it was fine yesterday, or maybe I just didn't notice it because i wasn't handling it so much, but today, it is very warm (After being idle for 30 mins, not plugged in or anything). Also, the framerate on our AR app is worse, XCode debugging navigator isn't telling me the fps, but compared to a 12 pro, it is noticeably jittery

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Are you using the Instagram app? It is documented that a bug in the app in combination with iOS 17 causes phones to massively heat up while doing basically nothing.

https://www.youtube.com/watch?v=P6X2ZIkYFsQ

Instagram's app is buggy, yes. It visibly increases battery consumption sometimes even if it's at the background. I keep it killed because of it.

(iPhone X, iOS 16.7)

No, it's clean out the box (apart from our own apps, but as I'm running through XCode,, I know the app was killed), I ran the system update and that's it

I've had that experience with some of my testing devices. For the jailbroken one, I can SSH in and see what's happening, and I recall that in at least one case it was an apple process that was sitting at 100% (I think it was springboard, but it's been a while). I killed it and it restarted automatically at a more reasonable 0-3% CPU load.

For the non-jailbroken devices, I just reboot them if I notice something is off.

This sounds like it could be the real culprit: a random process soaking up CPU time unnecessarily (and indefinitely). Has happened on many a PC I've used, especially in a corporate environment where Monday becomes a flurry of background scripts and 'silent' updates that make me wonder why my fans kicked in browsing my email.

Hopefully fixable with a patch.

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