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5

Performance has nothing to do with battery voltage. The reason is that the flash memory is "weared" and therefore slower and less responsible. My Nexus 7 (1st generation) is also very slow now and I have almost no apps on it. You can read here: Why Android Phones Slow Down Over Time, part "No Solid-State Drive TRIM" No Solid-State Drive TRIM The ...


4

Simple answer: Yes, but it's usually not noticeable and won't impact a device's ability to function as expected during it's lifetime. Full Explanation: Apps CAN leave traces of information behind when uninstalled. These are usually empty folder and misc. log files, but can also include files created by the application but are assumed that the user would ...


4

I understand that read/write speeds are dependent on what the phone is, and what the SD card is, but since both are flash memory, I thought the read/write times would pretty much be around the same. That is a wrong assumption. While they're all flash technology, there's a very wide certain in the speed of the storage. A Class 2 SD Card has a minimum ...


4

I can answer you about TCP WINDOW SIZE and TCP WINDOWSCALE fields as they appear in the TCP header. Initial TCP Window Size should be 0x3908 = 14600, at least it is what I found so far using several versions. (On most Linux distro I've used it is exactly the double 0x7210 = 29200.) Window Scale has different values depending on the version, older set it ...


3

Because the devices that have hanging problems are not the ones with better processors and more RAM. Unlike iPhone, where there's only the expensive devices, Android runs on a whole range of devices. At one end, there are the flagships from the big manufacturers, which have a lot of effort put into them to make sure the animations are silky smooth and there ...


3

For versions above 2.3.6, you could check the Google Developers page for the stock images for the nexus phones. They could provide a context for the sizes of pure Android. There is another site i had seen comparing all the features of all the versions of Android. I can't seem to remember the name though Edit: Found the site here.


3

Phones use Solid State Drives (SSDs) for storage instead of traditional Hard Drives (HDDs). This is because carrying and jostling HDDs can cause hardware problems. Solid State Drives, however, get slow as you fill them up. So when you start to fill up your phone, its storage gets slower. This means that it takes longer to read the code from storage into ...


3

The official Google Developers site has the full instructions and image repository on how to install a factory image for any Nexus device, including your "nakasi" Nexus 7 2012. I recommend 4.4.4, but you are free to go back as far as you want until you're comfortable with it's use. Cyanogenmod also has a stable 10.2 version (Android 4.3) - you can download ...


3

Deafult options, no osd, max smoothness Deafult options, osd, max choppiness With disable HW overlays I get average smoothness w/ and w/o osd apps. I think that only the last app requesting an hw overlay gets GPU access, the rest get offloaded to CPU, resulting in crappy rendering. But a 3dmark benchmark shows this: Default options, osd disabled 30fps ...


2

From the Android developer site: If an activity has lost focus but is still visible (that is, a new non-full-sized or transparent activity has focus on top of your activity), it is paused. A paused activity is completely alive (it maintains all state and member information and remains attached to the window manager), but can be killed by the system in ...


2

Android actually closes some background apps, but only when system ressources are missing (you open a massive game, for example) Greenify differ from the Android memory management by the fact that it kills all apps you specified at will or after a certain time, not only when ressources are missing. Nope. If some system apps that you do not use are ...


2

You can use the highly functional nexus root toolkit to do pretty much anything you need to on your Nexus device. Nexus Root Toolkit It allows rooting, return to stock, recovery and everything else you would need to repair your nexus 7 2012 WiFi aka 'grouper' / 'nakasi'. You can flash custom roms with it also. Other tools include unlocking or locking ...


2

Some cases: If it's downloading 1 file from 1 site - barely works: it's offloaded to modem. If it's downloading via torrent - might work harder; decrypting, hashing, etc. Basically, downloading takes little CPU. I assume the reason you're asking this is because "Why does downloading eat my battery so hard?" If that is the case, then think of your Cell ...


2

Generally speaking, any system app you can disable can safely be disabled. Core system apps will have the disable button greyed out. You can see this if you open App info for the Settings app itself. Go ahead and disable all Google apps you don't want.


2

It's possible that as you use your phone, the apps themselves becomes slower, because it is managing more of your data. A music app may work blazing fast when you've only got ten music in your library, but then you've collected about a hundred, and the database accesses becomes slightly slower as it's trying to generate the thumbnails or search through the ...


2

As a user, and not a developer, this is not an effect you should concern yourself with. For operations like disk defragmentation or use of flash memory as virtual memory, the sustained high disk write rates can wear out flash memory quickly. But "normal" usage by a human will not produce enough writes to create a wear issue. Let's take the sleep app as an ...


1

The problem is specialization! Apple's iOS is optimized for a small set of specialized Apple processors, which are ARM-based but because of e.g. custom extensions are able to do a lot more than the specification. Each app is compiled for every set of hardware (like one binary per CPU+GPU combination). Android needs to work on many different CPUs (Qualcomm, ...


1

The most probable answer is the speed of the NVRAM (or hard drive). When an application loads, it needs to read the application into memory - Hard drives and sd cards (but not so much SSD cards) are very slow to read and write, and this is most likely the bottleneck. A typical hard drive has a read speed of 100 Megabytes per second and SD card can vary ...


1

You might be having lots of data, including pictures and videos, and others that is media from social apps, including WhatsApp and FaceBook .. get a back up of that data, free some space, also delete unnacesiry apps, like those used for cleanups, hope this helps you run the phone acting smooth again,


1

Try 'JimTDI's Guide - Tuning the Nexus 7 with Android 5 Lollipop for Maximum Performance!' here https://goo.gl/X0HwAu The discussion for this post is here https://goo.gl/wqjv76


1

You've likely been updating the apps, and they're using more bloated APIs. I, personally, don't see a reason every app needs to carry Unicode support, for example. Facebook would be one of the largest offenders. 3 years ago it took 70MB RAM, now 200 so that it, among other snoopy things many apps now do, can carry its own browser to better track you. It ...


1

There are free apps in Google Play like Trepn Profiler that show you exactly what happens to the CPU frequencies of all cores during a file download. This data is captured in the background so the screen can be off. They also show the CPU load and actual power consumption in mA or mW. I've found that downloading a large file over WiFi uses more power than ...



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