Anyone notice how much stutter there is when scrolling?

[Radon87000]

Please provide a case where iOS 8 is smoother than iOS 9.

Heres some.

On the Air 2,when unlocking there is a hint of lag when the icons place themselves on the screen.This happens 1 out of 5 times and in the 6 months I was on iOS 8 it never happened.
On the Air 2,there is slight fps drop in the animations in the multitasking.

On the iPhone 6,theres the usual scroll lag in the recent calls menu and while pulling up CC.Also when I am on a call and I need to draw out the keypad the animation where the keypad draws up stutters every time which was not there on iOS 8.Than Chrome and many other aps have a split second black screen before launching.Hell Chrome is faster at launching on my friend's Moto G than on my iPhone 6 which is embarassing

 

[I7guy]

Heres some.

On the Air 2,when unlocking there is a hint of lag when the icons place themselves on the screen.This happens 1 out of 5 times and in the 6 months I was on iOS 8 it never happened.
On the Air 2,there is slight fps drop in the animations in the multitasking.

On the iPhone 6,theres the usual scroll lag in the recent calls menu and while pulling up CC.Also when I am on a call and I need to draw out the keypad the animation where the keypad draws up stutters every time which was not there on iOS 8.Than Chrome and many other aps have a split second black screen before launching.Hell Chrome is faster at launching on my friend's Moto G than on my iPhone 6 which is embarassing

I probably should have clarified by requesting a use case on Idevices that I actually have, which are 5s and iPad 2.

 

[vertsix]

I'm not following you. iOS 9 is less smooth for everyone. I can't recall anyone here posting an experience in which iOS 9 was smoother than iOS 8.

Ofcourse, the experience is different for different devices. The 5 is basicly the same on iOS 9 as on iOS 8, only a bit slower (mainly due to the weird app launch delay bug). The 5S is definitely less smooth than iOS 8. In fact, the 5 is more smooth than the 5S on iOS 9 (I have both, so I can compare them side-by-side).

My hypothesis is that there's an issue with Metal. Non-Metal devices are performing fine with iOS 9, quite interestingly.

 

[vertsix]

What device? On my iPad 2 iOS 9 wins. On 5s there isn't any inherent different.

Hahaha. I have a 5s and that is very much not the case. I have tested iOS 9 on several iPhone 5s, and the performance issues exist on all of them.

 

[Act3]

On my air 2 the place I see the most stutter is the message app. The little blue text "bubble" really staggers across after hitting send on a message. Sometimes it disappears while sending and then shows up a second or so later. Didn't happen before on 8.4.1 and doesn't happen on my iPhone 6 which is still on 8.4.1

 

[CupertinoSlave]

My hypothesis is that there's an issue with Metal. Non-Metal devices are performing fine with iOS 9, quite interestingly.

That is a really good observation. Just tried scrolling through Twitter on my iOS 9 iPhone 5 and its much smoother than my 6S. Now we are getting somewhere.

 

[elmateo487]

That is a really good observation. Just tried scrolling through Twitter on my iOS 9 iPhone 5 and its much smoother than my 6S. Now we are getting somewhere.

Holy hell, if you have that device still why haven't you posted a side by side video of this stutter you are talking about?!?!??

 

[iOSBry]

My hypothesis is that there's an issue with Metal. Non-Metal devices are performing fine with iOS 9, quite interestingly.

Regarding issues with Metal, there are a number of bugs filed for it and judging by the posts in the developer forums, I suspect this is driving some of the real issues we're seeing.

iOSBry

 

[I7guy]

Hahaha. I have a 5s and that is very much not the case. I have tested iOS 9 on several iPhone 5s, and the performance issues exist on all of them.

Both 5s's are working fine...I haven't verified the call history "micro-stutter" issue yet. But due to my app mix being different than yours we are seeing different things.

 

[mariusignorello]

LOL, stop implying people are too dumb to know what stuttering looks like or what it even is. Is that your only defense to people who aren't nitpicky to insane levels?

Your constant saying the same thing over and over doesn't fix the issue either. All you're doing is insulting who may not have the same level of stutter on their own devices.

I've tested my recent calls and Twitter app on my 6 with 9.1 beta 3 and it's not a laggy stuttery mess you make it out to be. Not even close.

Your own personal bad experience with iOS 9 doesn't make iOS 9 terrible for every single person out there. I'm not sure why that has to be explained over and over.

It's really funny that the biggest thing people are crying about are these "micro stutters". Seems to me that Apple nailed iOS 9 if the biggest talked about complaint is some crazy, super nitpick, almost meaningless thing and not the OS itself.

And I thought Apple's App Review staff was picky...

 

[Radon87000]

Both 5s's are working fine...I haven't verified the call history "micro-stutter" issue yet. But due to my app mix being different than yours we are seeing different things.

That is really hard to believe considering theres a lot of videos clearly showing the 5s to be faster on 8.4.1 than on 9.In fact apart from the 6S all iPhones run iOS 8 better.

 

[mariusignorello]

I'm not following you. iOS 9 is less smooth for everyone. I can't recall anyone here posting an experience in which iOS 9 was smoother than iOS 8.

Ofcourse, the experience is different for different devices. The 5 is basicly the same on iOS 9 as on iOS 8, only a bit slower (mainly due to the weird app launch delay bug). The 5S is definitely less smooth than iOS 8. In fact, the 5 is more smooth than the 5S on iOS 9 (I have both, so I can compare them side-by-side).

I have a 5c with 9.1 beta 3. There are "micro stutters" in Twitter, which I can live with. And yeah I've filed a Radar too. Another guy I know has a 6. His has the "micro stutters" in Twitter too. He also thinks this is a ridiculous complaint, and he paid full retail for his device.

 

[I7guy]

That is really hard to believe considering theres a lot of videos clearly showing the 5s to be faster on 8.4.1 than on 9.In fact apart from the 6S all iPhones run iOS 8 better.

I find the entire thing hard to believe as I haven't seen any videos that emulate my use cases and thus have a different mix and maybe am not seeing the "lag/stutter".

 

[dk001]

Both 5s's are working fine...I haven't verified the call history "micro-stutter" issue yet. But due to my app mix being different than yours we are seeing different things.

I suspect that this could be a big part. If I understand the iOS9 design correctly, Apple tried something different in the underlying design structure of iOS9. Apps added could have a big effect.

 

[marvz]

Just got an email back from the tweet bot Dev who literally told me it a an iOS 9 issue and they couldn't do anything until iOS 9 fixes it's UIcollectionview code. Is that placebo too?

No, but that's just one example. I can scroll through my emails, twitter feed, open websites, settings, etc. like crazy and nothing stutters nor lags. So what? Even when I scroll through all my notes in Evernote nothing stutters - perhaps they should take a look at Evernote's code (no offense).

 

[CupertinoSlave]

No, but that's just one example. I can scroll through my emails, twitter feed, open websites, settings, etc. like crazy and nothing stutters nor lags. So what? Even when I scroll through all my notes in Evernote nothing stutters - perhaps they should take a look at Evernote's code (no offense).

Well obviously you wont notice the stutter when you scroll fast.

 

[Radon87000]

If you're seeing dropped frames/hesitation/stuttering while scrolling, please file a bug report at http://bugreport.apple.com/ - file a report for each app where you observe the dropped frames/hesitation/stuttering while scrolling (Mail, Safari, Settings, etc.). A developer account is not required and it's the only way to get this resolved.

iOSBry

It says I need a developer account

 

[iOSBry]

It says I need a developer account

You only need an active Apple ID. To confirm, I logged in with an Apple ID that is not associated to any developer account and I can submit bug reports.

iOSBry

 

[Yun0]

iOS 9 is definitely NOT faster than 8 like Apple says.My iPhone is definitely slower than how it is on iOS 8.With 9.0.2 its closer to 8.4.1 than ever before but to say its faster is wrong.I have an Air 2,a 6, ipad Mini 1 and on all of them its definitely not faster than iOS 8

Okay.

 

[Radon87000]

You only need an active Apple ID. To confirm, I logged in with an Apple ID that is not associated to any developer account and I can submit bug reports.

iOSBry

Thats just not possible.On this page

https://developer.apple.com/bug-reporting/using-bug-reporter/

It clearly states

"To access Apple Bug Reporter, you must be a Registered Apple Developer."

 

[HankHowdy]

Its terrible. Stuttering and lag. 9.0.2 has been a bad release.

 

[Merkie]

My hypothesis is that there's an issue with Metal. Non-Metal devices are performing fine with iOS 9, quite interestingly.

This thought has popped up in my head as well. What other reason could there be for the 5S being less smooth than the 5?

 

[TC03]

I find the entire thing hard to believe as I haven't seen any videos that emulate my use cases and thus have a different mix and maybe am not seeing the "lag/stutter".

Just open control center. It's not fluid, it stutters. I have tried several iPhone 5s and 6 devices, all have stuttering animations when opening control center on iOS 9. If you don't see it, it's because you're already used to stuttering animations.

 

[TC03]

Both 5s's are working fine...I haven't verified the call history "micro-stutter" issue yet. But due to my app mix being different than yours we are seeing different things.

Sure they are working fine, it's not like they don't do what they're supposed to do. It's just that everything is so much laggier. I tested this extensively, and it's not something that only a few people experience. It's an iOS 9 problem, period. If you don't think there's a problem, you are probably a light user. I tend to use my phone heavily, I use it almost blind, and on iOS 8.4.1 everything was super responsive. On iOS 9, I can frequently tap the screen and nothing happens because well, it's laggy. Furthermore, the framerate of scrolling is much lower. Even in the settings app.

Seriously, the problem is there. If you don't see it, it's because you are less critical. That's fine, but don't make fun of people who are critical. We're talking about high end phones, we should be critical. If I want stutter, I can go around the block and buy the first Android device I see. I don't want that, never wanted that, so that's why I have an iPhone. The idea that even the iPhone is not smooth anymore is frustrating.

 

[Paddle1]

This thought has popped up in my head as well. What other reason could there be for the 5S being less smooth than the 5?

64bit architecture; the 5s had issues the 5 didn't on iOS 7.0 as well. I hope you're right though.

As simple as iOS 9 appears, for features like proactive, including search in apps and with siri, metal for the whole OS, improved battery life, and potentially 3D touch are things that probably would have required some significant changes to internal code, similar to iOS 8, leading to worse performance and less stability. Hopefully Apple will pull through on performance with iOS 9 in future updates as promised, now that the groundwork is laid out.