Develop Bugs

Galaxy Nexus battery Vs Nexus S battery

Hey guys,
I currently have a Nexus S however after 1 year I'm thinking of upgrading. My first choice would be the Galaxy Nexus because I prefer the pure Google experience and getting the updates first.
However there's some pretty decent phones on the horizon right now, such as HTC's latest offerings.
One thing that I want to make sure is that if I go for the Galaxy Nexus that I won't have worse battery life than my Nexus S right now.
I have the i9023 Nexus S (LCD version) running the latest ICS 4.0.4 and at the moment I get about 24 hours of battery life (that's with around 1.5 hours screen on time). I've seen some screenshots around here from the Galaxy Nexus showing a not so good battery life... but I don't know if it will be actually worse, better or the same (everyone uses the phone differently).
If you have upped from a Nexus S to a Galaxy Nexus, what's your opinion on this ?
One thing is certain, between the Galaxy SIII, HTC X and HTC S and the Galaxy Nexus, the Nexus seems to have the worst battery life. Although the other ones do not offer a pure Google experience... hmmmm

I'd say if you want an aosp experience, go with the nexus, if hats not as important to you as specs, get the s3 or one x. As for battery life, I recently got the sprint version and without lte, I get pretty poor battery life. Stock, I can barely get through an 8 hour day. With AOKP and Franco kernel, I can make it through the day with 20-30% left.
Sent from my Transformer Prime using XDA

I get usually between 4-5hrs screen on time and between 12 and 16 hours battery life.
Was on holidays for the last month and didn't use my phone to that extent and got almost 3 days on battery and an hour screen on time. (Data, wifi off)
Aokp b35 and Franco's latest nightly.

well I'd be using the phone in Europe so no LTE for now (just good old 3G).
4-5 hours on screen time is pretty good. On a normal day's work I don't even use it that much
I would probably try avoid having a heavily modded custom kernel because at least from my Nexus S' experience, the battery gain you get (mostly marginal) doesn't pay off the added instability and random reboots.

mindwalkr said:
well I'd be using the phone in Europe so no LTE for now (just good old 3G).
4-5 hours on screen time is pretty good. On a normal day's work I don't even use it that much
I would probably try avoid having a heavily modded custom kernel because at least from my Nexus S' experience, the battery gain you get (mostly marginal) doesn't pay off the added instability and random reboots.
Click to expand...
Click to collapse
I have never had a random reboot unless I undervolt dramatically.
All the kernels here are more stable than for the nexus s, I came from the nexus s.
And the battery gain is far from marginal! Trust me!

nodstuff said:
All the kernels here are more stable than for the nexus s, I came from the nexus s.
And the battery gain is far from marginal! Trust me!
Click to expand...
Click to collapse
Hmm that's good to hear!
Looks like I will have a fun time playing around with kernels then! With the Nexus S the only real use I found for custom kernels (besides undervolting) was Voodoo Sound and Back Light Notifications. Have to do some home work here and see if these are still needed though!

mindwalkr said:
Hmm that's good to hear!
Looks like I will have a fun time playing around with kernels then! With the Nexus S the only real use I found for custom kernels (besides undervolting) was Voodoo Sound and Back Light Notifications. Have to do some home work here and see if these are still needed though!
Click to expand...
Click to collapse
There is no voodoo sound and no need for BLN as the gnex has an L.E.D. notification light.
There is a high performance sound hack in some kernels but its no voodoo, that's one thing I miss from nexus s, the wolfson amp in it was the ****!

nodstuff said:
There is a high performance sound hack in some kernels but its no voodoo, that's one thing I miss from nexus s, the wolfson amp in it was the ****!
Click to expand...
Click to collapse
ahh I see! Cause right now the Voodoo patch is the only thing that can make my bass thin headphones sound any good with its bass boost. But that's not all.. hope the sound recording capabilities of the Galaxy Nexus are better than the Nexus S... cause I once had about 1 hour of ruined concert footage because the sound was like frying burguers... with the Voodoo patch you can fix the sound sensitivity profile

We'll as far as recording goes I have no idea because I haven't used it to record stuff like that.
As for the headphones well I use sennheiser cx300's so I never have a problem with bass or sound on the gnex but I would still love to have voodoo but unfortunately it doesn't have the hardware and supercurio can't do anything with it.

mindwalkr said:
Hey guys,
I currently have a Nexus S however after 1 year I'm thinking of upgrading. My first choice would be the Galaxy Nexus because I prefer the pure Google experience and getting the updates first.
However there's some pretty decent phones on the horizon right now, such as HTC's latest offerings.
One thing that I want to make sure is that if I go for the Galaxy Nexus that I won't have worse battery life than my Nexus S right now.
I have the i9023 Nexus S (LCD version) running the latest ICS 4.0.4 and at the moment I get about 24 hours of battery life (that's with around 1.5 hours screen on time). I've seen some screenshots around here from the Galaxy Nexus showing a not so good battery life... but I don't know if it will be actually worse, better or the same (everyone uses the phone differently).
If you have upped from a Nexus S to a Galaxy Nexus, what's your opinion on this ?
One thing is certain, between the Galaxy SIII, HTC X and HTC S and the Galaxy Nexus, the Nexus seems to have the worst battery life. Although the other ones do not offer a pure Google experience... hmmmm
Click to expand...
Click to collapse
Hi, I had a HTC one X recently, and being a bit of a phone geek that I am I like to have a second phone as a spare. So I bought a second hand nexus s. Started setting it up and began to realise how much I missed the pure Google experience, so I ended up using it in preference to my one X. Only two things kept making me switch back occasionally, and they were the speed and the poor battery life of the nexus s. I found the nexus was fine when on Wi-Fi but bad when using the cellular connection. The HTC was good on standby but astonishingly bad when in use.
So I sold the HTC and bought a Galaxy nexus, this was by far the best phone purchase I've made in ages,as although slower in terms of speed it's actually smoother in operation than both the HTC and nexus s, its camera is also good enough for my needs but best of all, on 4.0.4 now, my battery life is just excellent. Bearing in mind I've had all 3 phones set up the same, syncing the same email accounts and other accounts in the same environments, using the same sim card and everything I can say without doubt that the galaxy nexus has almost double the battery life of the nexus s, both on 4.0.4 and both on completely stock, unrooted, boot loader locked roms.
My advice, get a Gnex, and don't look back, lesson for me was that specs aren't everything, user experience counts for more.

I get atleast 5 hours of screen on time per charge, this includes constant wifi usage and music playing.
Sent from my Galaxy Nexus running AOKP+Franco on Tapatalk 2

mindwalkr said:
well I'd be using the phone in Europe so no LTE for now (just good old 3G).
4-5 hours on screen time is pretty good. On a normal day's work I don't even use it that much
I would probably try avoid having a heavily modded custom kernel because at least from my Nexus S' experience, the battery gain you get (mostly marginal) doesn't pay off the added instability and random reboots.
Click to expand...
Click to collapse
Franco's kernel is very stable. The omap in the galaxy nexus is a lot developer friendly. Samsung/Google really went all out to make this thing as open as possible.
Sent from my Galaxy Nexus using xda premium

Battery life with Jellybean

I know it's still early but has anyone else found Jellybean to have worse battery life compared to ICS? I'm totally stock with only the bootloader unlocked. Usually after a full day use with ICS I have 30% left and with JB I'm around 15%. On a day with heavy use I'm sure I will have to charge in the middle of the day which is very inconvenient. I'm trying to see if it's JB itself or some app which is draining things now that I'm on JB.

I'm finding it to be significantly better actually. I couldn't make it through a full day on ICS most days. With JB i'm easily above 30% most days at end of the day.

Maybe its because you like more your phone now and therefore you spend more time playing with it

Do you have Google Now enabled? The frequent location pings and GPS wakelocks drain the battery

harveydent said:
Do you have Google Now enabled? The frequent location pings and GPS wakelocks drain the battery
Click to expand...
Click to collapse
Just wondering if anyone has disabled latitude and how this effects Google now? The battery drain isn't really a bother for such a cool feature... just out of interest really
Sent from my Galaxy Nexus using xda premium

g8who said:
I know it's still early but has anyone else found Jellybean to have worse battery life compared to ICS? I'm totally stock with only the bootloader unlocked. Usually after a full day use with ICS I have 30% left and with JB I'm around 15%. On a day with heavy use I'm sure I will have to charge in the middle of the day which is very inconvenient. I'm trying to see if it's JB itself or some app which is draining things now that I'm on JB.
Click to expand...
Click to collapse
Mine seems worse compared to 4.0, phone doesn't go to deep sleep and keeps waking up ... maybe it's my Exchange email account, but this was fine when I was on 4.0.
How is your phone sleeping?

This may seem a strange suggestion, but I've found that leaving wi-fi on, even when I'm not using a wi-fi network seems to even out the battery drain. Helps to get Google Now working 100% as well. So try that when you can. I've found it works fantastically for me.

g8who said:
I know it's still early but has anyone else found Jellybean to have worse battery life compared to ICS? I'm totally stock with only the bootloader unlocked. Usually after a full day use with ICS I have 30% left and with JB I'm around 15%. On a day with heavy use I'm sure I will have to charge in the middle of the day which is very inconvenient. I'm trying to see if it's JB itself or some app which is draining things now that I'm on JB.
Click to expand...
Click to collapse
Stock vs. stock ROMs (both using LeanKernel as well) I've found Jellybean to actually have better battery life. I managed four hours of screen on time with the stock battery yesterday and today, something I could never come close to accomplishing with stock ICS.

turn off wifi, gps and 3g, and you'll go far. Turn em on only when necessary. I leave google now on. I'm only at 40% after 22 hours. Granted it defeats the purpose of a smartphone, but if I'm at work, working...then I don't need all those things turned on.

Turn off Google now of you don't really use it. I loved playing with it for a few days and realized it wasn't THAT useful for me I only really used weather. I keep the voice search active and turned the cards off. I just use a decent weather widget and maps WHEN I'm travelling if worried about time. HUGE battery saving. So many (understandable) wakelocks when activated.
Sent from my Galaxy Nexus using xda app-developers app

Battery life is worse for me, I'll stick to ICS for now, no rush.
Sent from my Galaxy Nexus using Tapatalk 2

It's weird, it seems the battery life is worse, but it could be that I'm using it more than before. The on-screen time does seems slightly better than on ICS, but I'm going to need more testing before I can confirm...

killyouridols said:
Turn off Google now of you don't really use it. I loved playing with it for a few days and realized it wasn't THAT useful for me I only really used weather. I keep the voice search active and turned the cards off. I just use a decent weather widget and maps WHEN I'm travelling if worried about time. HUGE battery saving. So many (understandable) wakelocks when activated.
Sent from my Galaxy Nexus using xda app-developers app
Click to expand...
Click to collapse
Hmmm...I will try that out, thanks. Google now was fun to play with the first couple days but if it means I need to charge middle of the day forget it. I will try turning it off and see what kind of results I get.
For the record, I've left all my GPS, Wifi and sleep settings intact from ICS so those settings shouldn't have effected my battery life.

I don't care for Google Now, just the new voice search part.
Sent from my Galaxy Nexus using Tapatalk 2

What kernel are you guys finding the best battery life with? I tried popcorn kernel and Francos kernel.
I think popcorn was better...
Sent from my Galaxy Nexus using Tapatalk 2

isinisterx said:
What kernel are you guys finding the best battery life with? I tried popcorn kernel and Francos kernel.
I think popcorn was better...
Sent from my Galaxy Nexus using Tapatalk 2
Click to expand...
Click to collapse
I didn't find Franco very pleasing. The Faux kernel (b6 I think) worked great and gave me excellent battery.
Sent from my Galaxy Nexus using Tapatalk 2

I could be wrong but I think project butter requires the processor to run at a higher clip and thus uses more juice.
Sent from my Galaxy Nexus using xda app-developers app

ttahatt said:
I could be wrong but I think project butter requires the processor to run at a higher clip and thus uses more juice.
Sent from my Galaxy Nexus using xda app-developers app
Click to expand...
Click to collapse
I'm actually getting better battery life on Jelly Bean than I was on Ice Cream Sandwich. Running at a higher clock isn't the only thing (or the main thing, I think) that gives Jelly Bean it's buttery smoothness.
Google really put effort into improving Vsync on the device, which mainly gives the device that buttery feel.
Sent from my Galaxy Nexus using Tapatalk 2

[Q] HTC One X vs SGS3 Quadrant Score

I recently got my AT&T SGS3. I'm so disapointed by the service, but that's another topic.
My wife has an HTC One X. I installed Quadrant on both devices: the One X had a score of 5600-ish and my SGS3 had one of 4600--ish. What gives?!
My SGS3 is rooted, I'm running Launcher Pro, and have installed Google Now. Other than that, I'm running (way) more apps: FB, Twitter, etc. She runs pretty bare-bones. Could this be impacting the score?

aagha said:
I recently got my AT&T SGS3. I'm so disapointed by the service, but that's another topic.
My wife has an HTC One X. I installed Quadrant on both devices: the One X had a score of 5600-ish and my SGS3 had one of 4600--ish. What gives?!
My SGS3 is rooted, I'm running Launcher Pro, and have installed Google Now. Other than that, I'm running (way) more apps: FB, Twitter, etc. She runs pretty bare-bones. Could this be impacting the score?
Click to expand...
Click to collapse
clear running apps from both phones and run again. My One X and SGS III are within a few points of each other. However, don't get hung up on quadrant scores. They're pretty meaningless. The only thing that matters is how you feel like the phone is operating.

gunnyman said:
clear running apps from both phones and run again. My One X and SGS III are within a few points of each other. However, don't get hung up on quadrant scores. They're pretty meaningless. The only thing that matters is how you feel like the phone is operating.
Click to expand...
Click to collapse
I did a couple of things: Killed LauncherPro and ran the stock TouchWiz. Also made sure I killed all apps. The score is significantly lower now. See attached.
The reason for running the benchmark was because I was complaining about the (1 day) battery life on my phone, and my wife says she goes two to three days without charging. So I was going to show her how much better my phone was. Imagine my dissapointment when not only did I demonstrate to her that my phone is much slower, but that her battery life is much much better.
The reality is, the phone is feeling sluggish, and I can't figure out why. Her screen seems to be better, battery life better, service (w/ Sprint vs. my AT&T) better, and performance better.
@gunnyman: Since you have both phones, I'd love to hear how you compare the two. At this point, I'm thinking of ditching my SGS3 and just getting the same phone she has.

Added attachment referenced in previous post.

That score tells me there's probably something wrong with your phone, or some app has a rogue process that is killing both performance and battery life.
Comparing the One X to the SGS III is very difficult. both have their plusses and minuses.
The screen on the One X is hands down the nicest one available today.
However, AT&T/HTC have locked it down to the point where even an iPhone is easier to hack.
Also the lack of removable storage was a dealbreaker for me.

gunnyman said:
That score tells me there's probably something wrong with your phone, or some app has a rogue process that is killing both performance and battery life.
Comparing the One X to the SGS III is very difficult. both have their plusses and minuses.
The screen on the One X is hands down the nicest one available today.
However, AT&T/HTC have locked it down to the point where even an iPhone is easier to hack.
Also the lack of removable storage was a dealbreaker for me.
Click to expand...
Click to collapse
How is the battery life on your two phones?
Also, any suggestions on how to track down the issue re something being wrong or a rogue process?

Well I sold the One X last week but Battery life is only SLIGHTLY better on it than on the sgs III I get through the day and have about 20-30% battery left before I put it on the charger. I'm a very heavy user. I see about 4 hrs of screen time.
When comparing battery life that's what matters. On your wife's phone how much screen on time does she have before she has to charge it up?
My wife has an HTC inspire which she has to charge every two days. However she uses her phone much less than I use mine.
As for tracking down what's happening with the phone, get better battery stats from the play store. It will track wake locks, which prevent the phone from going into deep sleep.
Install the program and check it at the end of the day and you'll get a very good idea about what is using the battery.

gunnyman said:
Well I sold the One X last week but Battery life is only SLIGHTLY better on it than on the sgs III I get through the day and have about 20-30% battery left before I put it on the charger. I'm a very heavy user. I see about 4 hrs of screen time.
When comparing battery life that's what matters. On your wife's phone how much screen on time does she have before she has to charge it up?
My wife has an HTC inspire which she has to charge every two days. However she uses her phone much less than I use mine.
As for tracking down what's happening with the phone, get better battery stats from the play store. It will track wake locks, which prevent the phone from going into deep sleep.
Install the program and check it at the end of the day and you'll get a very good idea about what is using the battery.
Click to expand...
Click to collapse
I'll give Better Battery Stats a shot. Thank you.

No problem. Good luck.

General consensus is that quadrant scores and benchmark scores mean nothing. If you want to compare try launching apps on both phones or just switching phones for a few days.

crash822 said:
General consensus is that quadrant scores and benchmark scores mean nothing. If you want to compare try launching apps on both phones or just switching phones for a few days.
Click to expand...
Click to collapse
Understood. But I am curious as to why my own Quadrant scores are going from the mid-4000's to 3200...

aagha said:
Understood. But I am curious as to why my own Quadrant scores are going from the mid-4000's to 3200...
Click to expand...
Click to collapse
I wouldn't worry, there's little things you can change that wouldn't effect real world performance but would buff quadrant by 1000 points... If your going to test try Antutu, it is the most accurate Imo but I still wouldn't worry to much what it says. I've seen my gsiii score anywhere from 4000 to 9500 in Antutu depending on apps open, current rom/kernel, run time, battery temp etc.
Sent from my SGH-I747 using Tapatalk 2

Out of curiosity, I just installed and ran Quadrant on my i747M (Telus) running the leaked Bell Jelly Bean firmware. Before running the benchmark, I went into the Task Manager and killed all running apps and freed memory. My score was 5906.
If you're running Samsung firmware, make sure you don't have the Power Saving toggle turned on.

One my One X I generally get way better battery life than with my S3. Never bothered to run any quadrant scores, but I'm sure the general consensus is that the One X has a little better battery life.
I also play with the S3 more than the One X so that may explain my battery difference.
Sent from my SAMSUNG-SGH-I747 using Tapatalk 2

Well one major thing I seen is that your lte isn't there which means your going to be considerably slow reboot that's what I had to do last night as I was getting spoty lte service last night. Can also boot into stock recovery and clear your cache out also
Sent from my SAMSUNG-SGH-I747

I got this. But I didn't close any apps. Had the music player going too.
Sent from my SAMSUNG-SGH-I747 using xda premium

I had the one x its lags ibplaces the s3 doesnt. I loved the build quality but yeah no ways its faster than a s3
Sent from my SGH-I747M using xda app-developers app

05GT said:
One my One X I generally get way better battery life than with my S3. Never bothered to run any quadrant scores, but I'm sure the general consensus is that the One X has a little better battery life.
I also play with the S3 more than the One X so that may explain my battery difference.
Sent from my SAMSUNG-SGH-I747 using Tapatalk 2
Click to expand...
Click to collapse
The HOX has worse battery life. I just took mine back for an S3 and the S3 is getting two-thirds longer life with identical usage. I also had a locked One X, so I couldn't even try some of the tweaks resulting in better life. I'm running auto-brightness and wifi is always on now with my S3, and previously with the One X I had wifi off whenever the screen was off and the screen was turned down to 30% brightness.
The difference was more than I expected, and considering the spare batteries I've got in the mail - an option the One X doesn't have - I'm very pleased with my switch. I'm sure the extra playing on your S3 is the difference.

aagha said:
Added attachment referenced in previous post.
Click to expand...
Click to collapse
Seems like you tried too many things to make an already perfect phone into too perfect and somewhere in the path something really got weird and that could be one of the reason you are seeing those differences between HOX and Galaxy S3. Also, you said your wife's HOX lasts almost 2 days on single charge. Now the question is, did you try to mimic your wife usage of HOX on your GS3? That way at least you'll get a better idea, what she's doing with her phone that it lasts for 2 days or vice-versa. Please don't take my opinion in any other way. If you are talking about quadrant score, I have attached mine below. It's running stock UCALH9 with stock launcher and most of the bloatware disabled. The only thing different is that I'm rooted. Other than that it's bone stock.
Edit: Forgot to mention that my phone lasts all day with 4 hours of screen time.

CM10 seems to produce lower scores than Touchwiz roms.
Sent from my Samsung Galaxy S3 with working maps using XDA Premium

[VZW] Galaxy Nexus - Battery Life suggestions

I have a VZW Galaxy Nexus and I am trying to improve the battery life on the device. I really don't do much with it other then texting and some FB/email here and there during the day. When I am driving back and forth to work I use the device to stream my music or run Pandora.
The battery life during the drive is not the huge issue, I know that using LTE and streaming data is going to use battery quite a bit, but when my phone is still with Wifi off at the office and I may send like 5 texts the device can drop 20% in 10% in an hour.
I am using Winner00 - CM10 rom right now with the kernel. I am about to try AOKP Build 3 but wanted to get any idea of what others were using and their battery life results. I am running the stock battery in the device.
Battery life and Stability is the most important things to me. Running the phone at stock GPU and CPU speeds is fine for everything I do.

There are some things you can do to improve but nothing that's really going to be a game changer. Buy a few extra chargers. There are a plethora of battery threads already, use the search function.

Get a giant 3800 battery like I did. It's ugly but I get over 5 hours screen on time and a day of use
Sent from my Galaxy Nexus using xda premium

You should give lean kernel a try. I'm a heavy user on aokp b3 and always on 4g. Since using that setup I've seen improved battery. Every kernel is different but lean kernel seems to have consistent performance.
AOKP Kindle Fire Monster

BrokenWall said:
I have a VZW Galaxy Nexus and I am trying to improve the battery life on the device. I really don't do much with it other then texting and some FB/email here and there during the day. When I am driving back and forth to work I use the device to stream my music or run Pandora.
The battery life during the drive is not the huge issue, I know that using LTE and streaming data is going to use battery quite a bit, but when my phone is still with Wifi off at the office and I may send like 5 texts the device can drop 20% in 10% in an hour.
I am using Winner00 - CM10 rom right now with the kernel. I am about to try AOKP Build 3 but wanted to get any idea of what others were using and their battery life results. I am running the stock battery in the device.
Battery life and Stability is the most important things to me. Running the phone at stock GPU and CPU speeds is fine for everything I do.
Click to expand...
Click to collapse
Dude, get AOKP build 3. It is really good with battery life and also, it is extremely smooth. Although, I do recommend using Franco's Kernel in combination with this ROM to get maximum satisfaction. I get around 3 hours of screen time, with 4G and WiFi in there. And also I have stock battery. Now thats saying something.

EpiclyEpic said:
Dude, get AOKP build 3. It is really good with battery life and also, it is extremely smooth. Although, I do recommend using Franco's Kernel in combination with this ROM to get maximum satisfaction. I get around 3 hours of screen time, with 4G and WiFi in there. And also I have stock battery. Now thats saying something.
Click to expand...
Click to collapse
3 hrs! That's insane for stock and aokp.
AOKP Kindle Fire Monster

3 hours thats it .. i'm planinng to switch over from nexus s, now i will have to think

Is Touchwiz really slower than stock Android?

We all love to rag on Touchwiz for being a bloated lag beast and pray for the day we can flash CM to get rid of it. However, there is a way to compare stock Touchwiz vs stock Android on two devices with exactly the same hardware specs and surprisingly, the difference is not that significant.
The takeaway is that Touchwiz seems faster loading video while stock Android is faster loading web content - I have a theory for this based upon how Touchwiz parses javascript, but that's another thread . On a benchmark basis the two are within a few hundred points of each other.
Anyway, here is an interesting video of a guy testing the S4 Play Edition (pure Android) vs the S4 Touchwiz Edition, both all stock and brand new with no rom optimizations or debloating. It's interesting and shows that while stock Android may be a bit faster overall, the difference is far less than one might have imagined. Of course the results may be different on the Tab S.

Nice, but surprising report. Guess the skeptics will need something else to complain about.
Sent from my SGP512 using Tapatalk

If only those 2 models were comparing Exynos vs Snapdragon.....then we would have a better understanding.
But I can say for sure, in daily use, Touchwiz is noticeably slower than stock.

kenkiller said:
If only those 2 models were comparing Exynos vs Snapdragon.....then we would have a better understanding.
But I can say for sure, in daily use, Touchwiz is noticeably slower than stock.
Click to expand...
Click to collapse
The thread is about TOUCHWIZ Vs ANDROID not Exynos vs Snapdragon. In this test anyway there doesn't appear to be much difference between the 2 running on the same platform. YMMV.
Apparently, Kitkat 4.4 introduced aggressive cpu throttling at much lower temps than prior Android versions. This may be something that is causing slowdowns you have perceived with prolonged use. While this increases battery life, it crushes performance. Fortunately a good kernel should be able to address this. In this case the hardware is fine, it is the OS which is screwing things up. I guess Google saw that people care more about battery life than blazing performance.
Anyway, here is the article. Interesting.
http://www.tomshardware.com/news/sa...at-performance-cpu-throttling-dvfs,26414.html
Again this is for the S4. Not sure how it applies to the Tab S.
Here is a thread by a dev who was able to disable the DVFS throttling on the s4. He claims that is to blame and not KitKat directly. Will research to see if thee is anything similar for the Tab S.
http://forum.xda-developers.com/showthread.php?t=2674928

Ok, I see that using Wanam Xposed you can disable Samsung DVFS in Advanced Settings. No idea if this works on our Tab S but I disabled it and nothing seemed to break on reboot. This should not increase benchmarks, just stop excessive throttling. One would guess you will see better performance and worse battery life.
We'll see.

mitchellvii said:
Ok, I see that using Wanam Xposed you can disable Samsung DVFS in Advanced Settings. No idea if this works on our Tab S but I disabled it and nothing seemed to break on reboot. This should not increase benchmarks, just stop excessive throttling. One would guess you will see better performance and worse battery life.
We'll see.
Click to expand...
Click to collapse
Hi Mitchell, did the battery life turn out worse?
Still deciding whether to root my tab our not (root loses a tv streaming program in belgian which is quite handy)

All I have to say is load up my alpha rom and see for yourself. It's like the difference between a tablet that came out this month (CM) and a tablet that came out three years ago (TW) performance wise.
I've gone from thinking about selling it to wondering how many years its going to be before they can produce a tablet that makes me want to upgrade.

eousphoros said:
All I have to say is load up my alpha rom and see for yourself. It's like the difference between a tablet that came out this month (CM) and a tablet that came out three years ago (TW) performance wise.
I've gone from thinking about selling it to wondering how many years its going to be before they can produce a tablet that makes me want to upgrade.
Click to expand...
Click to collapse
Soon as you're ready to pop out an 800 I'll be on it.

mitchellvii said:
Soon as you're ready to pop out an 800 I'll be on it.
Click to expand...
Click to collapse
There is a pre-alpha build up for the t800. Unfortunately I don't have one to debug but I hear it boots, touch screen works, but no wifi.

eousphoros said:
There is a pre-alpha build up for the t800. Unfortunately I don't have one to debug but I hear it boots, touch screen works, but no wifi.
Click to expand...
Click to collapse
Oh cool. I'll hold off on trying it until WiFi gets going but will watch for it.

mitchellvii said:
Oh cool. I'll hold off on trying it until WiFi gets going but will watch for it.
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It will probably be a bit. I don't own the 800 and mainly posted that to show it was possible. If I finish the 700 before the baby is born and no one else has picked it up then I'll try to get it finished.

thomas_pieps said:
Hi Mitchell, did the battery life turn out worse?
Still deciding whether to root my tab our not (root loses a tv streaming program in belgian which is quite handy)
Click to expand...
Click to collapse
You can use rootcloak + xposed module. the tv streaming app will not detect your root.

mitchellvii said:
I guess Google saw that people care more about battery life than blazing performance.
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Yes and this is one reason why I get sick of people moaning about battery life all the time. It's a mobile device constrained by current technology and what size battery can be squeezed in.
Yet people still expect 3 days battery, super duper speed and a nice slim light device.
For me I accept the limited capabilities of a battery in a mobile device and think they do a pretty good job as it is.
I want a mix of performance and battery, but I'll gladly sacrifice a bit of battery life for a lag free , smooth device.
However the more people moan about battery life the more the scales will tip to battery life at the cost of performance.

I would be willing to except a tablet a mm thicker to have a bigger battery
Sent from my SCH-I545 using XDA Free mobile app

thomas_pieps said:
Hi Mitchell, did the battery life turn out worse?
Still deciding whether to root my tab our not (root loses a tv streaming program in belgian which is quite handy)
Click to expand...
Click to collapse
you can use a root hider application to hide that application from root