iOS 9's impressive 'Low Power Mode' usage gains are not the work of magic, but processor throttling
posted by Ben R. / Jun 25, 2015, 10:56 PM
One M9 recently, albeit for different reasons. The Android-powered handset packs Qualcomm's Snapdragon 810, and in order to stop the controversial chipset from overheating, the Taiwanese firm has been forced to reduce performance. Thus, the terms "processor throttling" has gotten a bit of a bad rep over the last few months.HTC has engaged in this pastime with its flagship
In the case of iOS 9's Low Power Mode, however, it shouldn't be considered as such. Per the findings of MacRumors running iOS 9 beta through Geekbench 3 for iOS, an iPhone 6 Plus' multi-core score fell from 2,891 to 1,751 with Low Power Mode in action, while single-core performance decreased from 1,606 to 1,019. Proportionally similar conclusions were apparently drawn from an iPhone 5s put through the same test.
iPhone 6 Plus on iOS 9 beta in normal mode (left) and Low Power Mode
Losing performance is never a desirable trade-off, but when you've only a small portion of battery, all of the cores, RAM, and other high-spec stuff seems less significant. By hindering the processor to the point where presumably, an iPhone or iPad will still manage light and moderate tasks with aplomb, users seeking longevity will be able to bask in hours of additional usage time.
While the statistics do show clear throttling, it's worth remembering that the software is still in the initial stages of its beta stretch. Thus, things can and surely will change between now and when iOS 9 is ready for prime time, probably around September.
Posts: 1602; Member since: Oct 14, 2012
Not an Apple fan but I believe processing will be throttled on any device if it is in power saving mode.
posted on Jun 25, 2015, 11:01 PM 18
Posts: 4063; Member since: Jul 23, 2013
Not immediately, only when they reach very low levels of battery. Usually they get by with reducing other services and brightness. Still, lets see if this gets them any more battery life than they had. Seems as though they are trying to find more and more excuses not to increase the battery size and save costs. This will come at the cost of their "buttery" smooth animations which might cost them their image in the long run.
posted on Jun 25, 2015, 11:20 PM 2
Posts: 426; Member since: Sep 10, 2013
Your right I did test like this with my note 4 and 3. In idle on my note 4, even with power saving mode on or off, none of the the cores reached pass 1.2 ghz. Doing task with power saving on, the maximum speed the krait 450 cores was 1.9 ghz. When turn off it goes to the maximum 2.7 ghz. On note 3 with power saving on, the max was 1.5 ghz and turned off was 2.3 ghz
posted on Jun 26, 2015, 3:31 AM 0
Posts: 664; Member since: Oct 23, 2011
Yea I know for a fact that when power saving mode is turned on my Galaxy s4, not only are background processes turned off, but it also limits the maximum performance of the CPU. Same thing with the S5 and S6
posted on Jun 26, 2015, 12:12 PM 0
Posts: 358; Member since: Dec 13, 2010
Finally, welcome to 2012! :p
posted on Jun 25, 2015, 11:02 PM 14
Posts: 1817; Member since: Dec 08, 2014
Can't speak for other phones but my S2 already did this in 2011, when activating power saving mode.
posted on Jun 26, 2015, 5:33 AM 4
Posts: 1158; Member since: Mar 06, 2014
People's nowadays logic. Low Power Mode == Better Battery != Low Performance. Do you expect a decrease in energy consumption without a performance cost?
posted on Jun 25, 2015, 11:31 PM 1
Posts: 3960; Member since: Oct 21, 2014
Better Battery != Low Performance. That's right, and it's already being achieved with Quad Core and 64-Bit processors. They compute a lot faster, using the same energy, thus you can get more done without penalizing the battery life.
posted on Jun 26, 2015, 11:46 AM 1
do u know Steve Jobs uses blackberry
posted on Jun 26, 2015, 12:08 AM 0
Did you know blackberry is going to end up like Steve Jobs if they dont do something different soon.. (sorry BB fans, this guy been posting this all over - I dont mean for BB to die, quite the opposite) just wanna shut this guy up... Also sssm23, when you go to 3rd grade, they will teach you the difference of past tense and present tense and their magical use in sentences...
posted on Jun 26, 2015, 1:54 AM 1
Posts: 88; Member since: Mar 21, 2014
Do you know Eric Schmidt uses Blackberry Bold 9900 ?http://www.phonearena.com/news
posted on Jun 26, 2015, 5:25 AM 0
Posts: 250; Member since: Jul 23, 2014
One day in near future, iPhones will come with long charging cables and millions of reasons to stay near to power socket just because they wont improve battery life!
posted on Jun 26, 2015, 1:22 AM 1
Posts: 1605; Member since: Sep 22, 2014
Strange you say that, my friend bought a Samsung S6 Edge a few weeks ago and is having terrible battery life, having to charge halfway through the day under moderate use - as does another friend with a HTC M8. Apparently it's an issue with Android... We always banter about phones but at a year old my iPhone 6 generally ends the day around 50% and they've conceded that the latest Android OS sucks at the moment for them. Randomly repeated stereotypes don't seem very accurate at present.
posted on Jun 26, 2015, 6:57 AM 0
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