How do these devices run ios 9

[oldmacs]

I forgot what the performance was on iOS 7, but compare with iOS 8.4, iOS 9 runs much slower.

Oh, sorry, I say iPad mini 1.

Is it a clean install? Some people are saying that 9 is a slight improvement over 8 on a clean install

 

[Shirasaki]

I've definitely seen it on A5 devices (touch 5, 4S and iPad mini) under battery on the main page so that Is Very strange.

Yeah. My iPad mini doesn't receive this setting either.

 

[Shirasaki]

Is it a clean install? Some people are saying that 9 is a slight improvement over 8 on a clean install

Same. I don't have a developer account so I cannot do a clean install.
All I can hope is Apple second beta could greatly improve the performance.
And similar to iOS 8.4 beta, some users say they receive horrible battery issue on their devices. Unlike iOS 8.4 beta, most users report horrible battery life issue in iOS 9 beta 1.

 

[dilap]

I have seen this, but I choose upgrade.
Now, only notes with new features are not synced across devices running iOS prior to iOS 9.

Ahhhhhh, the way I'm using works best for me as I don't really use the new features and I would prefer to separate them from the synced ones.

 

[dilap]

A developer friend let me put the iOS 9 developer beta on one of my 5S's for a day, and it was laggggggggy even on a 5S.

Performance was very sluggish for me, so some people experiencing a sluggish A5 or A5X device may simply be experiencing the "first beta blues"

I'm sure by the time the final version rolls around, perhaps even by the first public beta, performance will get a nice increase all around.

Weird my 5s is lightening first and seems better than 8 to me, I can hardly notice a difference.

 

[Shirasaki]

Ahhhhhh, the way I'm using works best for me as I don't really use the new features and I would prefer to separate them from the synced ones.

Well, this could be better, in some cases, especially new things are not ready for prime time yet.

 

[nordique]

Weird my 5s is lightening first and seems better than 8 to me, I can hardly notice a difference.

I did not expect it to be sluggish, that's for sure. It did run better towards the end of the day. But I was also able to compare it side by side to my daily driver 5s which is running iOS 8 perfectly and there was still a gap in performance

But again, I'm positive it's to do with the initial beta rather than it actually slowing the device down. In the end, given the metal performance boost, I'm expecting it to run faster than iOS 8 (on 5s)