5 ms·

I've noticed on my SE that everything is running much much faster with iOS 12. It seems like the app store is actually really usable now. Does anyone have any i

I've noticed on my SE that everything is running much much faster with iOS 12. It seems like the app store is actually really usable now. Does anyone have any idea what they did?

overcast 8y ago
The biggest change was ramping up processor instantly, and then back down to maximize performance. So for launching an app / scrolling, CPU reaches highest state, until that portion is over, and immediately get back to efficiency setting for preserving battery life. Previously CPU time would ramp up slowly.
- baby_wipe 8y ago
  It's probably paranoia, but I feel like my 5S battery is draining faster since the update. That being said, the performance upgrade is well worth it.
  - overcast 8y ago
    It's not, my 6S did the same thing with intensive apps, like Instagram. With IG it's probably ALWAYS ramped up constantly scrolling, playing , downloading. They definitely sacrificed battery life for speed in older phones. My XS lasts like two days though.
    - hokumguru 8y ago
      What the heck are you doing to get 2 days from your XS? I barely get one!
      - overcast 8y ago
        really just business stuff with instagram / email / text!
      - deaddodo 8y ago
        My XS Max gets ~1.5 days with fairly regular-heavy usage.
      - coldtea 8y ago
        Don't keep it open all the time?
  - mtgx 8y ago
    Why would it be paranoia? Waking up the CPU faster and maximizing its performance will definitely drain the battery faster. I assume the iOS12 update includes a combination of more aggressive waking and maximizing of performance along with a reverting of what they did previously to old phones when they lowered their performance to maintain the battery life of the degraded battery. If you remember there was quite a bit of scandal about this earlier this year. My guess is your old iPhone's battery will also last half as much as it did originally within months. Yes, it's a factor of the new changes, but let's not forget it's primarily a factor of Apple using batteries that lose a significant percentage of their capacity after 2 years in the iPhones, and then hiding much of that by slowing your iPhone down. Maybe Apple should put higher quality batteries in their phones - just saying.
    - micv 8y ago
      > let's not forget it's primarily a factor of Apple using batteries that lose a significant percentage of their capacity after 2 years in the iPhones As far as I can tell this simply isn't true. My iPhone SE is at 89% of maximum capacity after 2.5 years of very regular use. It's standing up pretty well.
      - tracker1 8y ago
        I think in general a lot of batteries in mobile devices for a couple years dropped off dramatically if charging to full regularly (ex: on the charger all night every night). My Nexus 4 and Nexus 6P were really bad here... my Pixel 2XL has been pretty good on battery life still after about a year now. I think it was mostly immature technology adopted relatively early. There have been advances in battery tech, and it takes time to work kinks out.
    - coldtea 8y ago
      >Yes, it's a factor of the new changes, but let's not forget it's primarily a factor of Apple using batteries that lose a significant percentage of their capacity after 2 years in the iPhones, and then hiding much of that by slowing your iPhone down. Compared to what available and suitable miraculous technology?
  - earenndil 8y ago
    It's definitely not. On my 6s, once it gets below 40% or so, it's prone to rapid drain (2-5% all at once) and random shutdowns. None of which happened on ios 11.
  - coldtea 8y ago
    If you're using an 5S still, it's time to update that battery. By now it's what, 5 years old?
    - overcast 8y ago
      My 6S battery was maybe only a few months old(replaced), had same issue with crazy battery drain on IOS12, particularly with Instagram.
  - fauigerzigerk 8y ago
    I thought so too, but I noticed that the update also increased the display brightness considerably. So maybe that's what's causing the slightly faster battery drain.
pazimzadeh 8y ago
I noticed it on my SE as well. The WWDC keynote from this year highlights some of the performance improvements that iOS 12 brings to old phones. Something about ramping up processor activity and quickly ramping it down when you don't need it..I don't remember the details. The end result is that with iOS 12, apps launch twice as fast, camera app opens 70% faster, and the keyboard comes up twice as fast too. https://developer.apple.com/videos/play/wwdc2018/101/ https://developer.apple.com/videos/play/wwdc2018/101/
pohl 8y ago
There were several things in addition to the adjustments they made to the clock frequency curve others have mentioned. There were a couple of fixes in Autolayout constraint resolution that were at least quadratic but are now linear. The prefetching in table views was optimized to make scrolling them smoother. A lot of RAM is saved by big improvements to the backing stores for image resources. They made app launching faster. The on screen keyboard comes up faster, and they made it respond to typing faster. Opening the camera from the lock screen has been made faster.
- bunnycorn 8y ago
  Good list, on top of that, they made the share sheet loading asynchronous, so it pops up faster and can be used sooner. Made complex workflows a breeze.

I've noticed on my SE that everything is running much much faster with iOS 12. It seems like the app store is actually really usable now. Does anyone have any idea what they did?

overcast 8y ago

The biggest change was ramping up processor instantly, and then back down to maximize performance. So for launching an app / scrolling, CPU reaches highest state, until that portion is over, and immediately get back to efficiency setting for preserving battery life. Previously CPU time would ramp up slowly.

baby_wipe 8y ago
It's probably paranoia, but I feel like my 5S battery is draining faster since the update. That being said, the performance upgrade is well worth it.
- overcast 8y ago
  It's not, my 6S did the same thing with intensive apps, like Instagram. With IG it's probably ALWAYS ramped up constantly scrolling, playing , downloading. They definitely sacrificed battery life for speed in older phones. My XS lasts like two days though.
  - hokumguru 8y ago
    What the heck are you doing to get 2 days from your XS? I barely get one!
    - overcast 8y ago
      really just business stuff with instagram / email / text!
    - deaddodo 8y ago
      My XS Max gets ~1.5 days with fairly regular-heavy usage.
    - coldtea 8y ago
      Don't keep it open all the time?
- mtgx 8y ago
  Why would it be paranoia? Waking up the CPU faster and maximizing its performance will definitely drain the battery faster. I assume the iOS12 update includes a combination of more aggressive waking and maximizing of performance along with a reverting of what they did previously to old phones when they lowered their performance to maintain the battery life of the degraded battery. If you remember there was quite a bit of scandal about this earlier this year. My guess is your old iPhone's battery will also last half as much as it did originally within months. Yes, it's a factor of the new changes, but let's not forget it's primarily a factor of Apple using batteries that lose a significant percentage of their capacity after 2 years in the iPhones, and then hiding much of that by slowing your iPhone down. Maybe Apple should put higher quality batteries in their phones - just saying.
  - micv 8y ago
    > let's not forget it's primarily a factor of Apple using batteries that lose a significant percentage of their capacity after 2 years in the iPhones As far as I can tell this simply isn't true. My iPhone SE is at 89% of maximum capacity after 2.5 years of very regular use. It's standing up pretty well.
    - tracker1 8y ago
      I think in general a lot of batteries in mobile devices for a couple years dropped off dramatically if charging to full regularly (ex: on the charger all night every night). My Nexus 4 and Nexus 6P were really bad here... my Pixel 2XL has been pretty good on battery life still after about a year now. I think it was mostly immature technology adopted relatively early. There have been advances in battery tech, and it takes time to work kinks out.
  - coldtea 8y ago
    >Yes, it's a factor of the new changes, but let's not forget it's primarily a factor of Apple using batteries that lose a significant percentage of their capacity after 2 years in the iPhones, and then hiding much of that by slowing your iPhone down. Compared to what available and suitable miraculous technology?
- earenndil 8y ago
  It's definitely not. On my 6s, once it gets below 40% or so, it's prone to rapid drain (2-5% all at once) and random shutdowns. None of which happened on ios 11.
- coldtea 8y ago
  If you're using an 5S still, it's time to update that battery. By now it's what, 5 years old?
  - overcast 8y ago
    My 6S battery was maybe only a few months old(replaced), had same issue with crazy battery drain on IOS12, particularly with Instagram.
- fauigerzigerk 8y ago
  I thought so too, but I noticed that the update also increased the display brightness considerably. So maybe that's what's causing the slightly faster battery drain.

pazimzadeh 8y ago

I noticed it on my SE as well. The WWDC keynote from this year highlights some of the performance improvements that iOS 12 brings to old phones. Something about ramping up processor activity and quickly ramping it down when you don't need it..I don't remember the details. The end result is that with iOS 12, apps launch twice as fast, camera app opens 70% faster, and the keyboard comes up twice as fast too. https://developer.apple.com/videos/play/wwdc2018/101/ https://developer.apple.com/videos/play/wwdc2018/101/

pohl 8y ago

There were several things in addition to the adjustments they made to the clock frequency curve others have mentioned. There were a couple of fixes in Autolayout constraint resolution that were at least quadratic but are now linear. The prefetching in table views was optimized to make scrolling them smoother. A lot of RAM is saved by big improvements to the backing stores for image resources. They made app launching faster. The on screen keyboard comes up faster, and they made it respond to typing faster. Opening the camera from the lock screen has been made faster.

bunnycorn 8y ago
Good list, on top of that, they made the share sheet loading asynchronous, so it pops up faster and can be used sooner. Made complex workflows a breeze.