iPhone New 5s with iOS 8.Read the posts on upgrading but...

[oldmacs]

Anyway, OP, iOS 9.2.1 is better in any way than iOS 8. And the iPhone 5S still is a fantastic device. No point in avoiding the upgrade.

That's obviously not true given the number of people here who have commented to the opposite. If you were being truthful, you'd write ' I find iOS 9 better than iOS 8' as it is not an absolute fact that it is.

 

[stevemiller]

for what its worth, iOS 9.3b6 on my iPhone 6 handles all animations noticeably better: control centre, notification centre, spotlight, multitasking (although i still dislike the weird acceleration when scrolling) are all pretty consistently smooth now.

so there was poor optimization, but they do appear to have largely fixed it in the upcoming release... at least on the 6, which isn't far off from the 5s.

 

[oldmacs]

for what its worth, iOS 9.3b6 on my iPhone 6 handles all animations noticeably better: control centre, notification centre, spotlight, multitasking (although i still dislike the weird acceleration when scrolling) are all pretty consistently smooth now.

so there was poor optimization, but they do appear to have largely fixed it in the upcoming release... at least on the 6, which isn't far off from the 5s.

Given the 6 is not much of an improvement Over the 5S in terms of speed, I agree improvements in 9.3 seen in the 6 should carry over onto the 5S,

 

[Radon87000]

I'm using iOS 9 on even older iPad mini first generation, and while they aren't speed champions they surely aren't like cheap android tablets...
All this fuss is greatly exaggerated by you and many others.

The iPad Mini takes 4 seconds to catch up to my input.The animations show stutters all over the place.Ton of frame drops in the app switcher.If this isn't like a Android tablet I don't know what is.My iPhone 6 also shows random stutters every now and then similar to a mid range Android.
The ONLY device I have which does not stutter as much is the iPad Air 2 which I assume is bruteforcing it's way through the inefficient code through it's hardware

 

[I7guy]

That's obviously not true given the number of people here who have commented to the opposite. If you were being truthful, you'd write ' I find iOS 9 better than iOS 8' as it is not an absolute fact that it is.

And by the same rational people who think iOS 8 is the pinnacle of perfection should say:"I find iOS 8 to be better than ios 9" as it is not an absolute fact.

 

[Max(IT)]

That's obviously not true given the number of people here who have commented to the opposite. If you were being truthful, you'd write ' I find iOS 9 better than iOS 8' as it is not an absolute fact that it is.

Security patches, new functionalities... iOS 9 is better than iOS 8 as a matter of fact.

The iPad Mini takes 4 seconds to catch up to my input.The animations show stutters all over the place.Ton of frame drops in the app switcher.If this isn't like a Android tablet I don't know what is.My iPhone 6 also shows random stutters every now and then similar to a mid range Android.
The ONLY device I have which does not stutter as much is the iPad Air 2 which I assume is bruteforcing it's way through the inefficient code through it's hardware

4 seconds? Lol .... Unfortunately I can't write what this post means (but everyone knows).
Have your iPad mini checked: it's obviously defective.

And by the same rational people who think iOS 8 is the pinnacle of perfection should say:"I find iOS 8 to be better than ios 9" as it is not an absolute fact.

Indeed.
But they probably were the same complaining about iOS 8 at the time, and will be the same complaining about iOS 10 in six months

To the OP, again, go ahead and install iOS 9: your iPhone 5S isn't the fastest anymore, but you won't regret it.

 

[oldmacs]

Security patches, new functionalities... iOS 9 is better than iOS 8 as a matter of fact.

No its not. Some people don't like stuttering animations. Some people value performance over features.
[doublepost=1457939048][/doublepost]

but you won't regret it.

More rubbish - What if the person doesn't like stuttering?

iOS 9 has more features and obviously is more secure than iOS 8, however different people have different priorities.
[doublepost=1457939262][/doublepost]

And by the same rational people who think iOS 8 is the pinnacle of perfection should say:"I find iOS 8 to be better than ios 9" as it is not an absolute fact.

Its fairly impossible to say as an overall judgment that iOS 8 is better than iOS 9 as it is not as secure and is missing iOS 9 features. People here are saying that iOS 9 doesn't perform as well as iOS 8 in terms of graphical performance.

For some people graphical performance is important - This is why people stick with iOS 6 or iOS 7, even though say iOS 8 and 9 have more features and security patches.

 

[Max(IT)]

No its not. Some people don't like stuttering animations. Some people value performance over features.

performance ?
Performance has NOTHING to do with some frame drops now and then (if any).
performance wise there isn't ANY difference going from iOS 8 to iOS 9.

More rubbish - What if the person doesn't like stuttering?

Indeed more rubbish. You are describing iOS 9 as a complete mess. That couldn't be more false.

iOS 9 has more features and obviously is more secure than iOS 8, however different people have different priorities.

oh, it "only" has more features and more security ?
But people have different priorities and keep complaining about a few drops in the frame rate in very limited occasions. Interesting.

Its fairly impossible to say as an overall judgment that iOS 8 is better than iOS 9 as it is not as secure and is missing iOS 9 features. People here are saying that iOS 9 doesn't perform as well as iOS 8 in terms of graphical performance.

iOS 9 clearly is superior, by far.

For some people graphical performance is important - This is why people stick with iOS 6 or iOS 7, even though say iOS 8 and 9 have more features and security patches.

again, graphic performance aren't affected at all. A game, an app or a benchmarks run exactly the same in iOS 9 as in iOS 8. Quite on the contrary iOS 9 drivers are slightly improved with new apps, especially using Metal.
So, again, all this discussion about "graphical performance" is utterly nonsense.

 

[oldmacs]

performance ?
Performance has NOTHING to do with some frame drops now and then (if any).
performance wise there isn't ANY difference going from iOS 8 to iOS 9.

Well yes actually, the performance of animations is part of performance. If a UI features stuttering of animations, it can make the whole thing feel slower than it actually is.

Indeed more rubbish. You are describing iOS 9 as a complete mess. That couldn't be more false.

No I am not, if you bothered to read what I wrote, then you'd see I talked about improve features, and security. What I was saying is that you go on about 'iOS 9 being better than iOS 8' in every single way and that is false. Side by side testing will show you more stuttering especially in animation for things such as notifications centre, control centre, app opening and closing and so on. You may not notice them, you may not care about them, but that doesn't make them disappear for other's. I know from my own perspective, the stuttering on my iPad Mini 2 under iOS 9 drives me up the wall, it makes using the device far less pleasurable - it degrades the whole experience, and makes the experience akin to using a cheap Android tablet, instead of a 'premium' iPad. I have some friends who think that iOS 9 is just as fast and don't notice stuttering on their iPhone 5S's and good for them. But I also have friends who find the opposite and find the stuttering beyond annoying, and as a result iOS 9 is not perfect for them in every way.

Its very clear that you either don't notice stutter (as many people don't) or it doesn't bother you, and I'm glad for you but that doesn't mean every single person is like that. Just in the same way that while I notice stutter, it doesn't mean that every other person does notice it.

A similar thing would be related to CRT TVs. CRT TVs produce high pitch sounds when they are turned on, it is an absolute fact that they do. Years ago when my family had a CRT TV, I could always hear the nuisance of a noise, however my Dad couldn't. Through whatever reason, possibly different hearing ranges, I could hear the noise and found it really annoying while he couldn't. Mum could hear the noise but it didn't bother her. The noise is like the Stutter, some people are like me and find the stutter (like I found the noise) very annoying. Some people don't see it at all (like my dad and the noise) and then other people see the stutter but it doesn't bother them (like my mum and the noise).

oh, it "only" has more features and more security ?
But people have different priorities and keep complaining about a few drops in the frame rate in very limited occasions. Interesting.

People have different priorities. iOS 9 wasn't an overly feature packed release, and some people aren't overly worried about security. Try and view things from other perspectives for once. Frame rate drops and stuttering are noticeable to the people who have replied to this thread.

iOS 9 clearly is superior, by far.

Yes in the areas of security and features it is.

again, graphic performance aren't affected at all. A game, an app or a benchmarks run exactly the same in iOS 9 as in iOS 8. Quite on the contrary iOS 9 drivers are slightly improved with new apps, especially using Metal.
So, again, all this discussion about "graphical performance" is utterly nonsense.

So, are animations not graphics? Animations are part of the graphics performance of iOS, and for whatever reason, Metal doesn't cope so well with them, which is especially noticeable on A7 devices and A8 (not 8X) devices. The A9 devices seem to have enough horsepower to run what I can only put down to poor coding, well such that animations rarely stutter on the Air 2, 6S and iPad Pro.

 

[Merkie]

The difference between iOS 9.3 and iOS 8.4.1 are really small (though iOS 8.4.1 is slightly faster, especially due to the input blocking issue). I'd wait for the 9.3 release (significantly better than 9.2.1).

 

[Max(IT)]

Well yes actually, the performance of animations is part of performance. If a UI features stuttering of animations, it can make the whole thing feel slower than it actually is.

nope. Performance are related to how fast apps are run.
The phone doesn't "feel" slower at all, if a few frames drop...

No I am not, if you bothered to read what I wrote, then you'd see I talked about improve features, and security. What I was saying is that you go on about 'iOS 9 being better than iOS 8' in every single way and that is false. Side by side testing will show you more stuttering especially in animation for things such as notifications centre, control centre, app opening and closing and so on. You may not notice them, you may not care about them, but that doesn't make them disappear for other's. I know from my own perspective, the stuttering on my iPad Mini 2 under iOS 9 drives me up the wall, it makes using the device far less pleasurable - it degrades the whole experience, and makes the experience akin to using a cheap Android tablet, instead of a 'premium' iPad. I have some friends who think that iOS 9 is just as fast and don't notice stuttering on their iPhone 5S's and good for them. But I also have friends who find the opposite and find the stuttering beyond annoying, and as a result iOS 9 is not perfect for them in every way.

I stand my position: iOS 9 is better than iOS 8. It's a matter of fact.
people arguing about a few frames drop (and the same stuttering exist ON EVERY operative system, iOS 8 and Android 6 included) make me laugh when I consider how superior the whole operative system is.

Its very clear that you either don't notice stutter (as many people don't) or it doesn't bother you, and I'm glad for you but that doesn't mean every single person is like that. Just in the same way that while I notice stutter, it doesn't mean that every other person does notice it.

I didn't say you don't have to notice that. Im sure I could even measure it with a proper tool.
I just said that advising NOT to install iOS 9 based on that ridiculous "issue" (that I say again, exist also on iOS 8) is wrong. Plain wrong.

A similar thing would be related to CRT TVs. CRT TVs produce high pitch sounds when they are turned on, it is an absolute fact that they do. Years ago when my family had a CRT TV, I could always hear the nuisance of a noise, however my Dad couldn't. Through whatever reason, possibly different hearing ranges, I could hear the noise and found it really annoying while he couldn't. Mum could hear the noise but it didn't bother her. The noise is like the Stutter, some people are like me and find the stutter (like I found the noise) very annoying. Some people don't see it at all (like my dad and the noise) and then other people see the stutter but it doesn't bother them (like my mum and the noise).

totally unrelated.

People have different priorities. iOS 9 wasn't an overly feature packed release, and some people aren't overly worried about security. Try and view things from other perspectives for once. Frame rate drops and stuttering are noticeable to the people who have replied to this thread.

frame rate drops compared to security issues and functionalities are noticeable to people that just want to criticize Apple over something (a very popular activity).

So, are animations not graphics? Animations are part of the graphics performance of iOS, and for whatever reason, Metal doesn't cope so well with them, which is especially noticeable on A7 devices and A8 (not 8X) devices. The A9 devices seem to have enough horsepower to run what I can only put down to poor coding, well such that animations rarely stutter on the Air 2, 6S and iPad Pro.

nope. Animations are .... animations. And they works (at least on my iDevices).
Graphics performances are the frame rate of a game, or a movie. Both are excellent on an iPhone, with iOS 9 or iOS 8.
You can say you don't like iOS animations, of course, but you can't really criticize iOS graphics performance.

 

[Merkie]

performance ?
iOS 9 clearly is superior, by far.

Not really. iOS 9 has clear input blocking issues, and animations tend to stutter more on iOS 9 as well. Except for these issues, iOS 9 works perfectly. No bugs and extremely stable.

Also, you can't determine for other people what their definition of "performance" should be. A lot of people value the iOS smoothness and even have explicitly bought iPhones for the smoothness of iOS. So for them, a few dropped frames is indeed degraded performance.

 

[Max(IT)]

The difference between iOS 9.3 and iOS 8.4.1 are really small (though iOS 8.4.1 is slightly faster, especially due to the input blocking issue). I'd wait for the 9.3 release (significantly better than 9.2.1).

How can you say 9.3 is "significantly better" since it isn't yet released ?
I mean, you are probably right, I know, but you can't really judge iOS 9.3 by the beta, since beta are inherently subjected to change (and unstable also in performance ).

 

[Merkie]

How can you say 9.3 is "significantly better" since it isn't yet released ?
I mean, you are probably right, I know, but you can't really judge iOS 9.3 by the beta, since beta are inherently subjected to change (and unstable also in performance ).

I'm assuming that the final release of iOS 9.3 won't differ much from iOS 9.3B6.

 

[I7guy]

Well yes actually, the performance of animations is part of performance. If a UI features stuttering of animations, it can make the whole thing feel slower than it actually is.

It really doesn't though. The stuttering on my cellular screen doesn't effect the speed at which a 4k movie can be edited in imovie.

No I am not, if you bothered to read what I wrote, then you'd see I talked about improve features, and security. What I was saying is that you go on about 'iOS 9 being better than iOS 8' in every single way and that is false. Side by side testing will show you more stuttering especially in animation for things such as notifications centre, control centre, app opening and closing and so on. You may not notice them, you may not care about them, but that doesn't make them disappear for other's. I know from my own perspective, the stuttering on my iPad Mini 2 under iOS 9 drives me up the wall, it makes using the device far less pleasurable - it degrades the whole experience, and makes the experience akin to using a cheap Android tablet, instead of a 'premium' iPad. I have some friends who think that iOS 9 is just as fast and don't notice stuttering on their iPhone 5S's and good for them. But I also have friends who find the opposite and find the stuttering beyond annoying, and as a result iOS 9 is not perfect for them in every way.

Stuttering doesn't affect me and I guess others, because overall it's just a visual glitch and for the most part 9.3b6 has eliminated most of it, from what I read and I care not about visual glitches.

People have different priorities. iOS 9 wasn't an overly feature packed release, and some people aren't overly worried about security. Try and view things from other perspectives for once. Frame rate drops and stuttering are noticeable to the people who have replied to this thread.

So, are animations not graphics? Animations are part of the graphics performance of iOS, and for whatever reason, Metal doesn't cope so well with them, which is especially noticeable on A7 devices and A8 (not 8X) devices. The A9 devices seem to have enough horsepower to run what I can only put down to poor coding, well such that animations rarely stutter on the Air 2, 6S and iPad Pro.

Nothing new in ios 9, except the following: http://www.apple.com/ios/whats-new/ I understand one persons feature packed release is another persons meh release. But that's the way it goes in the big world of ours; but you do yourself a disservice with statements like that.

And as you said, try to view things from other perspectives for once. Not everyone cares about some visual glitches.

[doublepost=1457956826][/doublepost]

I'm assuming that the final release of iOS 9.3 won't differ much from iOS 9.3B6.

Could be slightly different, but I don't expect much.

 

[Max(IT)]

Not really. iOS 9 has clear input blocking issues, and animations tend to stutter more on iOS 9 as well. Except for these issues, iOS 9 works perfectly. No bugs and extremely stable.

Also, you can't determine for other people what their definition of "performance" should be. A lot of people value the iOS smoothness and even have explicitly bought iPhones for the smoothness of iOS. So for them, a few dropped frames is indeed degraded performance.

A few dropped frames exists also in iOS 8 and Android 6...
If serial complainers keep speaking about "poor performance" of iOS 9, people seeking for advice like the OP could be deceived and start thinking iOS 9 is making his iPhone somewhat "slower". That's just not true.

 

[oldmacs]

nope. Performance are related to how fast apps are run.
The phone doesn't "feel" slower at all, if a few frames drop...

No you're wrong. Performance is a whole heap of things (App opening speed, animation speeds, perceived speed etc) , and if animations stutter they make everything feel laggy.

stand my position: iOS 9 is better than iOS 8. It's a matter of fact.
people arguing about a few frames drop (and the same stuttering exist ON EVERY operative system, iOS 8 and Android 6 included) make me laugh when I consider how superior the whole operative system is.

No it is not a matter of fact. Its a personal opinion. The same stuttering did not exist on iOS 6 for example. It is not a few frames dropping, it is iOS not handling system animations properly.

I didn't say you don't have to notice that. Im sure I could even measure it with a proper tool.
I just said that advising NOT to install iOS 9 based on that ridiculous "issue" (that I say again, exist also on iOS 8) is wrong. Plain wrong.

The stutter on certain devices is greater than on iOS 8. It is only wrong in your opinion. It is not a ridiculous issue, its your complete inability to see past your own small mindset. I totally get why you prioritise other things over animations, but you need to understand that not everyone is you.

totally unrelated.

Please start reading things, it is an analogy. It is not unrelated, it explains why certain people notice certain things.

frame rate drops compared to security issues and functionalities are noticeable to people that just want to criticize Apple over something (a very popular activity).

Oh for goodness sake. Frame rate drops are very noticeable to many people. Are you that insecure about Apple that anyone who criticises is suddenly an Apple hater? It is also a very popular (and just as annoying) activity to blindly support Apple. Oh yeah lets all close our eyes and pretend that Apple is perfect.

nope. Animations are .... animations. And they works (at least on my iDevices).
Graphics performances are the frame rate of a game, or a movie. Both are excellent on an iPhone, with iOS 9 or iOS 8.
You can say you don't like iOS animations, of course, but you can't really criticize iOS graphics performance.

Animations are very present on iOS devices, they are everywhere and noticeable every single time you open an app, multitask, unlock your phone etc. No I can criticise the performance of metal in iOS 9 as it fails in smoothly animating animations all the time. I love iOS's animations, I would like them not to stutter as frequently as they do on my iPad Mini.

 

[Merkie]

A few dropped frames exists also in iOS 8 and Android 6...
If serial complainers keep speaking about "poor performance" of iOS 9, people seeking for advice like the OP could be deceived and start thinking iOS 9 is making his iPhone somewhat "slower". That's just not true.

Well, apparently they think so. You can't really tell others what their opinion on certain matters should be. And most of the time, they have objective evidence to support their claims.

 

[Max(IT)]

No you're wrong. Performance is a whole heap of things (App opening speed, animation speeds, perceived speed etc) , and if animations stutter they make everything feel laggy.

No, I'm right. Performance are performance. You don't measure performance opening and closing notification centre like a mad. You run apps and benchmarks. Apps and benchmarks aren't slower on iOS 9. At all

No it is not a matter of fact. Its a personal opinion. The same stuttering did not exist on iOS 6 for example. It is not a few frames dropping, it is iOS not handling system animations properly.

No, it's not a personal opinion. iOS 6 was ANCIENT, stale, and everyone was complaining about that at the time. It didn't stutter because there was very little to stutter about at the time....

The stutter on certain devices is greater than on iOS 8. It is only wrong in your opinion. It is not a ridiculous issue, its your complete inability to see past your own small mindset. I totally get why you prioritise other things over animations, but you need to understand that not everyone is you.

I explained my point several time, but you keep ignoring it to fulfill your agenda.
To advice someone NOT TO INSTALL IOS 9 , basing this decision only out of a few frames drops, drops existing also on iOS 8, is utterly ridiculous and deceiving.

Oh for goodness sake. Frame rate drops are very noticeable to many people. Are you that insecure about Apple that anyone who criticises is suddenly an Apple hater? It is also a very popular (and just as annoying) activity to blindly support Apple. Oh yeah lets all close our eyes and pretend that Apple is perfect.

no one said Apple is perfect. I don't know a single user here saying that.
But I know very well haters....
Frame drops could be noticeable and still not a valid reason to advice people not to install iOS 9 over iOS 8, especially on a 64 bit device like an iPhone 5S (for an iPhone 5 and older it could be different).

Animations are very present on iOS devices, they are everywhere and noticeable every single time you open an app, multitask, unlock your phone etc. No I can criticise the performance of metal in iOS 9 as it fails in smoothly animating animations all the time. I love iOS's animations, I would like them not to stutter as frequently as they do on my iPad Mini.

I'd like iOS 9 to be better, too.
That's not the point.

 

[Merkie]

No, I'm right. Performance are performance. You don't measure performance opening and closing notification centre like a mad. You run apps and benchmarks. Apps and benchmarks aren't slower on iOS 9. At all

Performance is more than simply running Geekbench. Why don't you just accept that your definition is of performance is different? There's no dictionary that says that performance can only be measured by running Geekbench.

Frame drops could be noticeable and still not a valid reason to advice people not to install iOS 9 over iOS 8, especially on a 64 bit device like an iPhone 5S (for an iPhone 5 and older it could be different).

It's not a valid reason for you. Everyone should decide for themselves whether frame drops are a valid reason to upgrade or not to upgrade.

You really should try to understand that not everything has the same priorities and requirements. Not everyone is like you.

 

[oldmacs]

[doublepost=1457956826][/doublepost]
Could be slightly different, but I don't expect much.

It really doesn't though. The stuttering on my cellular screen doesn't effect the speed at which a 4k movie can be edited in imovie.

That is not the point. I'm talking about the animations for opening, closing apps, multitasking, pulling down notifications centre, opening app folders, notifications centre etc, lagging and stuttering and creating an appearance of slower performance. Animations can greatly impact on how fast you feel your device is running. It is a point many people complain about with regard to Android devices, so it is a shame when my iPad Mini 2 ends up feeling the same. Its to the point my 3GS is more capable of rendering animations than my iPad Mini, which is ridiculous and beyond annoying.

Stuttering doesn't affect me and I guess others, because overall it's just a visual glitch and for the most part 9.3b6 has eliminated most of it, from what I read and I care not about visual glitches.

And if you had bothered reading what I have written in this thread, I've said exactly that. Some people don't notice or aren't bothered by stutter. However some people are. It is as simple as that.

Nothing new in ios 9, except the following: http://www.apple.com/ios/whats-new/ I understand one persons feature packed release is another persons meh release. But that's the way it goes in the big world of ours; but you do yourself a disservice with statements like that.

And as you said, try to view things from other perspectives for once. Not everyone cares about some visual glitches.

Please read before responding. I said 'Not an overly feature packed release'. That is true, compared to iOS 7 and 8, iOS 9 is relatively lacking in new features (Especially on iPhones). Thats nothing unusual, iOS 6 was similar. I did my self no disservice. iOS 9 is simply not a hugely feature packed release when compared to other iOS revisions.

And I took my own advice, you will notice I've said over and over that some people find stuttering annoying, and some people don't. Some people notice them, some people don't. I have clearly stated that over and over again. What I was objected to was iOS 9 being described as superior in every single way, because especially depending on your position, it might not be. Some people find new features amazing, my sister for example couldn't give a damn about new features, I on the other hand love new features.

 

[Max(IT)]

Well, apparently they think so. You can't really tell others what their opinion on certain matters should be. And most of the time, they have subjective evidence to support their claims.

fixed for you

Still have to see someone really measuring the frame rate drops with any tool and make a scientific comparison between iOS 8 and 9.

Frame drops exist, for sure. Is iOS 9 worse than iOS 8 ? I'm not convinced.

 

[Merkie]

fixed for you

Still have to see someone really measuring the frame rate drops with any tool and make a scientific comparison between iOS 8 and 9.

Frame drops exist, for sure. Is iOS 9 worse than iOS 8 ? I'm not convinced.

A lot of people have done so using Xcode. If iOS 9 is worse than iOS 8 depends on your priorities.

 

[Max(IT)]

Performance is more than simply running Geekbench. Why don't you just accept that your definition is of performance is different? There's no dictionary that says that performance can only be measured by running Geekbench.

It's not a valid reason for you. Everyone should decide for themselves whether frame drops are a valid reason to upgrade or not to upgrade.

You really should try to understand that not everything has the same priorities and requirements. Not everyone is like you.

Who spoke about "GeekBench only" ? I didn't even mention it.
I said APPS AND BENCHMARKS, because every single one isn't any worse on iOS 9.
So measure performance as you like , but opening and closing half of the notification center isn't a "scientific controlled test", while running apps and benchmarks is.
[doublepost=1457958379][/doublepost]

A lot of people have done so using Xcode. If iOS 9 is worse than iOS 8 depends on your priorities.

Xcode running on an iPhone ? Very interesting, being an OS X application ...

Could you link me some scientific tests ? And please, avoid the Mr.Noone test on youtube where someone is just keep opening and half closing notification center... I'm speaking about a test.

 

[Merkie]

Who spoke about "GeekBench only" ? I didn't even mention it.
I said APPS AND BENCHMARKS, because every single one isn't any worse on iOS 9.
So measure performance as you like , but opening and closing half of the notification center isn't a "scientific controlled test", while running apps and benchmarks is.
[doublepost=1457958379][/doublepost]
Xcode running on an iPhone ? Very interesting, being an OS X application ...

Could you link me some scientific tests ? And please, avoid the Mr.Noone test on youtube where someone is just keep opening and half closing notification center... I'm speaking about a test.

That's not the point. The discussion is not whether the issues are real or not, the point is that you should try to accept that not everyone is like you. Just accept that and let other people decide whether they should upgrade to iOS 9 for themselves.