My iPhone 11 Pro is 50% slower after I updated to iOS 14.5.1 • Hacker News Board

Re: My iPhone 11 Pro is 50% slower after I updated to iOS 14.5.1

#11

Post by raspasov » Wed, May 12, 2021, 4:06 PM UTC

bigphishy wrote: post #6

toomuchtodo wrote: post #4

Earlier quoted context omitted.

Background process doing some sort of migration or other data conversion between versions? Strange the device wouldn't wait until during the night while plugged in, but without context, that might not be an option.

Kind of sad that we don't have a top or process viewer. Or free -m / open system. This makes me yearn for an open source OS on my phone again, I may have to look into a pine phone.

Yes... I remember back in the day I had terminal with root access on a jailbroken iPhone. You could install almost any package on your phone via terminal.

Re: My iPhone 11 Pro is 50% slower after I updated to iOS 14.5.1

#12

Post by raspasov » Wed, May 12, 2021, 4:08 PM UTC

kwdc wrote: post #10

DeliriumTrigger wrote: post #5

Earlier quoted context omitted.

Indexing or rebuilding I guess.

Yet no notification. The goblins inside the ios doing their thing behind closed doors. Even a heads-up saying "hey we're doing some work behind the scenes on your device as part of the upgrade" would do.

That's potentially a good idea. It could even be hidden in the developer section, since those are the people most likely to notice.

Re: My iPhone 11 Pro is 50% slower after I updated to iOS 14.5.1

#13

Post by lifty » Wed, May 12, 2021, 4:08 PM UTC

bigphishy wrote: post #6

toomuchtodo wrote: post #4

Earlier quoted context omitted.

Background process doing some sort of migration or other data conversion between versions? Strange the device wouldn't wait until during the night while plugged in, but without context, that might not be an option.

Kind of sad that we don't have a top or process viewer. Or free -m / open system. This makes me yearn for an open source OS on my phone again, I may have to look into a pine phone.

I agree, but it shouldn't be a classic process viewer. It should be a task viewer which has some context or understandable description. Like "photo analysis job" or "iOS 14.5.1 data migration job".

Re: My iPhone 11 Pro is 50% slower after I updated to iOS 14.5.1

#14

Post by raldi » Wed, May 12, 2021, 4:09 PM UTC

raspasov wrote: post #2

A lot of reports on the internet about this. I updated this morning and continued working on an iOS app. Everything felt slow. I thought I did something stupid in my code. Apparently not. As per this Geekbench 5 test, the phone scores ~1200 where it used to regularly score ~3000+ (!!!). There's a lot of rumors what's the cause of this but no official explanation from Apple as of right now that I can find.

Every time there’s an iOS update, the internet goes crazy about their phone being slow or hot or not holding a charge. Then, a day or two later, the background system processes finish doing their post-upgrade homework and everything goes back to normal.

Re: My iPhone 11 Pro is 50% slower after I updated to iOS 14.5.1

#15

Post by tgv » Wed, May 12, 2021, 4:10 PM UTC

toomuchtodo wrote: post #4

raspasov wrote: post #3

Earlier quoted context omitted.

Aaaand it's fixed... I didn't do anything specific. It took a few hours (?!) after the upgrade. It scored many times low, but now it seems to score at a normal level (3000+). Really wonder what the explanation for all of that is.

Background process doing some sort of migration or other data conversion between versions? Strange the device wouldn't wait until during the night while plugged in, but without context, that might not be an option.

Might explain why my battery dropped that much, too.

Re: My iPhone 11 Pro is 50% slower after I updated to iOS 14.5.1

#16

Post by saagarjha » Wed, May 12, 2021, 4:13 PM UTC

bigphishy wrote: post #6

toomuchtodo wrote: post #4

Earlier quoted context omitted.

Background process doing some sort of migration or other data conversion between versions? Strange the device wouldn't wait until during the night while plugged in, but without context, that might not be an option.

Kind of sad that we don't have a top or process viewer. Or free -m / open system. This makes me yearn for an open source OS on my phone again, I may have to look into a pine phone.

If you connect your iPhone to your Mac you can run Instruments on it to figure out what is going on. I used to recently to figure out that Slack had been making my entire phone slow because it was busy looping in the background.

Re: My iPhone 11 Pro is 50% slower after I updated to iOS 14.5.1

#17

Post by raspasov » Wed, May 12, 2021, 4:15 PM UTC

raldi wrote: post #14

raspasov wrote: post #2

A lot of reports on the internet about this. I updated this morning and continued working on an iOS app. Everything felt slow. I thought I did something stupid in my code. Apparently not. As per this Geekbench 5 test, the phone scores ~1200 where it used to regularly score ~3000+ (!!!). There's a lot of rumors what's the cause of this but no official explanation from Apple as of right now that I can find.

Every time there’s an iOS update, the internet goes crazy about their phone being slow or hot or not holding a charge. Then, a day or two later, the background system processes finish doing their post-upgrade homework and everything goes back to normal.

Well I've been developing iOS apps for a long time, and updated many times. I don't remember anything as dramatic as this!

Re: My iPhone 11 Pro is 50% slower after I updated to iOS 14.5.1

#18

Post by albertzeyer » Wed, May 12, 2021, 4:15 PM UTC

raldi wrote: post #14

raspasov wrote: post #2

A lot of reports on the internet about this. I updated this morning and continued working on an iOS app. Everything felt slow. I thought I did something stupid in my code. Apparently not. As per this Geekbench 5 test, the phone scores ~1200 where it used to regularly score ~3000+ (!!!). There's a lot of rumors what's the cause of this but no official explanation from Apple as of right now that I can find.

Every time there’s an iOS update, the internet goes crazy about their phone being slow or hot or not holding a charge. Then, a day or two later, the background system processes finish doing their post-upgrade homework and everything goes back to normal.

To be fair, iOS maybe should put some visual indicator that it is doing this. Then everything would be obvious.

Re: My iPhone 11 Pro is 50% slower after I updated to iOS 14.5.1

#19

Post by thih9 » Wed, May 12, 2021, 4:23 PM UTC

In case anyone missed it, the author of the submission added an update [1] saying that after some time the issue went away:

> Aaaand it's fixed... I didn't do anything specific. It took a few hours (?!) after the upgrade. It scored many times low, but now it seems to score at a normal level (3000+). Really wonder what the explanation for all of that is.

[1]: https://news.ycombinator.com/item?id=27131683 .

Re: My iPhone 11 Pro is 50% slower after I updated to iOS 14.5.1

#20

Post by raldi » Wed, May 12, 2021, 4:23 PM UTC

raspasov wrote: post #17

raldi wrote: post #14

Earlier quoted context omitted.

Every time there’s an iOS update, the internet goes crazy about their phone being slow or hot or not holding a charge. Then, a day or two later, the background system processes finish doing their post-upgrade homework and everything goes back to normal.

Well I've been developing iOS apps for a long time, and updated many times. I don't remember anything as dramatic as this!

Hmm, if I specifically go looking for reports of benchmarks going down, it does seem to be a much more prevalent story with this version than any previous one.