For those having lag with iOS 9

[ranini]

For me: (Iphone6)

Icloud backup.

DFU mode + Itunes.
Install IOS9 , start as new iphone.
Icloud backup back

No lags or at least same than Ios 8.4 I felt sometimes better perfomance ,maybe, placebo.

Same performance.
Same battery life.

 

[clubtech]

For me: (Iphone6)

Icloud backup.

DFU mode + Itunes.
Install IOS9 , start as new iphone.
Icloud backup back

No lags or at least same than Ios 8.4 I felt sometimes better perfomance ,maybe, placebo.

Same performance.
Same battery life.

It's known that iPhone 6 doesn't lag as much as the 6+ . My friend has a 6 and I have 6+ and comparing both next to each other you can clearly see how the 6+ struggles and stutters a lot more .

 

[Act3]

The OP suggestion worked for my iPhone 6. Phone seems as smooth as i

For me: (Iphone6)

Icloud backup.

DFU mode + Itunes.
Install IOS9 , start as new iphone.
Icloud backup back

No lags or at least same than Ios 8.4 I felt sometimes better perfomance ,maybe, placebo.

Same performance.
Same battery life.

same worked for me. I did all that this past weekend. Actually seems smoother in some areas than iOS 8.4.1 and am seeing better battery life past few days.

 

[mconk]

After testing all of the betas, the GM, 9.1, and the newly released 9.0 seeds, I decided to try out the OPs steps. It's been about 30min since iCloud restored my content (I have a 100mb pipe as well) and I've gotta say, it all still seems about the same. Not terrible. But there are a few lag points that are definitely noticeable. On my 6, specifically, pulling down spotlight drops frames every time...even typing here on MR via safari seems lagged...and the app switcher almost always drops frames. Otherwise, most parts seem buttery smooth - with the exception of the annoying .5 second delay or whatever it is between closing and launching a new app, switching tasks, etc. battery life on all builds including the betas had been around 4 and a half hours, consistently. But these laggy areas have also been consistent across the board, in those specific areas. Not a huge issue...just noticeable. It's a bummer that ios9 seems to perform flawlessly (as it should) on the 6s/6s+ while making the 6 seem outdated, when we know it's fully capable. Sigh. Here's to hoping these lag issues are ironed out in a future update.

 

[EW800]

Sigh. Here's to hoping these lag issues are ironed out in a future update.

I sure hope the update comes soon....

 

[imagineadam]

Just go back to 8.4.1.

iOS 9 is like 8.4.1 with a condom on. It just doesn't feel quite right poking around the apps and the font looks weird. If you want a smooth and natural iOS expierence they way it was meant to be, go back to 8.4.1!

 

[dk001]

Preface: I'm using a 6, and went through the entire beta cycle, fresh installed the GM, then updated to the final post GM update the day of. Like a ton of ya'll, I experienced lag going in and out of apps, and all over the place. Sometimes it'd go away, sometimes it was glaringly obvious. I got frustrated with the spontaneity of my 1 year old phone performing oddly sub-par, and today seemingly fixed it and hopefully can help anyone else. Last tidbit - I use iCloud backups.

1. Made iCloud backup
2. Connected phone to iTunes via USB
3. Hit restore. Not update, not shift+click anything, no IPSW downloads, just restore.
4. When the phone came back on, restored from iCloud backup
5. An hour later, everything is smooth as butter.

I know everyone lends anecdotal advice for fixing this type of ****, but the difference in my phone right now after finishing the process above, and prior to doing it is night and day. Hopefully this helps at least one person get by with iOS 9!

** Just to add on, I was the biggest critique of the half second delay when going out of an app and already tapping a new one to open via the homescreen, and i'm not longer experiencing it.

Tried that - iMini 3 LTE - no joy
Choppy Safari, Laggy in a lot of places.

 

[dk001]

Honestly I think the notion still applies, but this IS a forum for enthusiast who care about the littlest of details. My Dad for example upgraded his 6+ OTA and has no complaints. While I notice the *half second* lag, he does not, and even if I pointed it out he probably wouldn't be able to tell or care.

Everything is YMMV though, I'm just trying to offer a remedy of a completely OCD problem I was experiencing

I don't count a busted VPN, choppy Safari, etc... as little details.

 

[Dark Goob]

Just for the anecdotal addition, I did a hard back up to iTunes and then did the same thing. Worked brilliantly. I'm lag free. For what it is worth.

Know why? Because when Apple beta tests with its devs, it instructs them to all install iOS the way you just said (as a clean install).

Literally nobody ever actually beta tests over the air updating before release happens. That's why clean installs work great, and "updating" turns your phone into a piece of garbage.

 

[Dark Goob]

wait for a iOS 9.0.1 update? iOS 7 and 8 saw .0.1 updates come out a week after the major update.

I waited until 8.2. I recommend waiting until 9.2.

 

[C DM]

Know why? Because when Apple beta tests with its devs, it instructs them to all install iOS the way you just said (as a clean install).

Literally nobody ever actually beta tests over the air updating before release happens. That's why clean installs work great, and "updating" turns your phone into a piece of garbage.

Yeah, they don't check the most common methods of updating that their customers use...and then somehow updates that work just fine most of the time for most people turn devices into pieces of garbage...right.

 

[Coupz]

With one or both toggles on I have no lag. But disabling both brings back the lag. i6 64GB
Have tried both multiple times and before/after restarts.

Yeah still lagging here -_-