Database Users

Cannot accept call, Slider wont work when the phone is busy.

This has happened to me numerous times and i'm wondering if its a common issue:
You receive a call and you cant slide the slide the slider to accept the call for the life of you. A sew seconds later you get a dialog saying that the Dialer app is not responding; Force close /Wait.
This usually happens when you're trying to load a web page or playing a game. (anything processor intensive)
Is there a fix for this? Maybe set the priority of the dialer process higher if you have root ?

britoso said:
This has happened to me numerous times and i'm wondering if its a common issue:
You receive a call and you cant slide the slide the slider to accept the call for the life of you. A sew seconds later you get a dialog saying that the Dialer app is not responding; Force close /Wait.
This usually happens when you're trying to load a web page or playing a game. (anything processor intensive)
Is there a fix for this? Maybe set the priority of the dialer process higher if you have root ?
Click to expand...
Click to collapse
this happened a lot with G1... but never with Nexus One. I even watched movies or listened to music etc., and still the call will come through immediately.
I wonder how many apps you have installed, and how much memory you have left?
Cleaning up all unnecessary apps you never use + checking all automated services (such as feed readers, news/weather updaters, Email probers, etc. should be set to decent times (e.g. my news feed reader never loads news automatically, only on app start, weather updates every 4 hours, etc.)

I have a LOT of apps installed (around 180). Only about 20MB internal disk space left.
In fact I frequently need to uninstall apps to install new ones
I don t have a lot of apps running. Usually about 40-50MB RAM free.

britoso said:
I have a LOT of apps installed (around 180). Only about 20MB internal disk space left.
In fact I frequently need to uninstall apps to install new ones
I don t have a lot of apps running. Usually about 40-50MB RAM free.
Click to expand...
Click to collapse
WOW WOW WO
180 apps? How can you possibly make use of them all? I have 120 right now, and already feel it's too much (like... do we really ever use Google Goggles, or Finance?, or Wikitude, or... or...)
I have about 90MB internal disk space left, and I don't want to go much lower than that
But I guess what's killing you is that a lot of these apps, although maybe not running permanently, will wake up from time to time, to check your location, to update this or that, to do this or that....
I would try to reduce the number a lot and see whether the problem goes away, maybe say at 50MB internal space.
I always tell myself, even if it's cool to show off an app to a friend, if I don't really use it a lot or at all, I can delete it and always install it again if I want to - that's the beauty of the market (also paid apps remain paid, and can be redownloaded for free, unless you have refunded them).
hope it helps

another thing that could give you another 40MB, + using the second memory bank which is currently not in use on stock is to root the phone and flash cyanogen's CM 5.0 beta5 (or wait until it's out of beta).
That's maybe why I have 90 MB left at 120 apps, and you have only 20 MB left at 180 apps.
This would also provide more RAM, and you could run smoother with the number of apps open.
but just do the rooting if you really want to, as it voids warranty

shmigao said:
another thing that could give you another 40MB, + using the second memory bank which is currently not in use on stock is to root the phone and flash cyanogen's CM 5.0 beta5 (or wait until it's out of beta).
That's maybe why I have 90 MB left at 120 apps, and you have only 20 MB left at 180 apps.
This would also provide more RAM, and you could run smoother with the number of apps open.
but just do the rooting if you really want to, as it voids warranty
Click to expand...
Click to collapse
Thanks for the advice. cyanogen's ROMs are very tempting, but looking at the changes it looks like it gets better every week. I think I'll wait for a bit before rooting and jump in at 5.0 FINAL.

[Q] Lagging

A few days ago i noticed some not so smooth scrolling when in my calls log. So i thought the phone had been on too long and did a reboot (which solved the scroll lag).
After the boot. I went into the menu and most of my apps had disappeared (i think mainly on my sd). After a minute or two they appeared (out of order and all on the last menu ) so im guessing it was the sd card (which is the standard class 2 i think which came with the phone) My sd has like 12gb free still. And i only have like 25 apps/games. Anybody noticed similar things? And would upgrading my sd to a higher class slove the prob?
I also noticed that when my phone is on standby and i open the game pad without unlocking the phone (takes 20 secs maybe to launch) then press the back or home button. The 4 quick links next to the menu icon have no icons just blank sqaures for a 10 seconds or so. The same if i open the menu a few icons are the blank ones then they appear. Is this the same for other people?
I never noticed this problem before. And its bugging me. The phone is not rooted, uses the standard wallpaper. And only i have google search on the main screen no widgets. Any suggestions? Im gonna try a reset but thought i would see if other people had any similar experiences. Any help/suggestions would be appreciated

What you are probably seeing here is Android's garbage collection system in place. Basically, when apps need memory, the OS will transparently kill apps that aren't in use without telling you. Generally, the user shouldn't really notice it... but things like your apps not all showing right away is normal when the home app is starting back up after having been killed previously. Things that are relatively resource intensive, such as the Playstation emulator built into the Xperia Play, will most likely cause all other apps that are non-essential to be killed.
I don't know if you've used other Android phones before, but it's pretty normal.

Yeah this is my first android phone . Suppose if its pretty normal i will get used to it in time. Maybe i will unroot the phone and remove all the crap and see if that makes it any better. Thanks for the reply btw

Mozza2k11 said:
Yeah this is my first android phone . Suppose if its pretty normal i will get used to it in time. Maybe i will unroot the phone and remove all the crap and see if that makes it any better. Thanks for the reply btw
Click to expand...
Click to collapse
what launcher are you using? if you use launcher pro, there is a "system persistant option" this means it will not kill your launcher in the background, and the apps disapearing issue should not happen

AndroHero said:
what launcher are you using? if you use launcher pro, there is a "system persistant option" this means it will not kill your launcher in the background, and the apps disapearing issue should not happen
Click to expand...
Click to collapse
Im just using the standard play UI. Thinking of trying Launcher Pro or GO Launcher EX. If i unlock my phone before opening the game pad the icons are there. Also if i give my phone 20-30 secs after rebooting my apps are where i left them. So i guess i need to have more patience lol

[Q] slow response by A500

Hi,
When I received my 3.1 ' update the UI was really responsive do not know what happened now. The pad response has been hopeless since last 3 days. Everything is slow, even when I am typing, I have to wait 2 secs to see that on screen.

I am sorry I don't have a solution but I will agree with you and the Acers sometimes slowness. I install tons of apps and I have noticed the a500 isn't as fast as when I first updated to 3.1 (didn't have many apps installed yet)..... It kinda feels like a windows computer sometimes and needs a reboot or to uninstall some apps that run all the time.

Klaus nailed it
The speed of the OS depends on the clock settings (IMHO, a500 without over clocking is a bit laggy) but the real issue : software you have installed.
Search the market for a copy of ATK and use it to see what programs you have installed are running all the time, even after you use the back button or an in-app option to shut said program down. I stay away from apps that want to keep themselves running all the time unless there is a good reason for the app to do that - twitter, g+, stuff like that - makes sense for it to run all the time, that way you can get push notifications. Use a task manager to scan for tasks that have no logical reason to run all the time, and then check the permissions of that app.
In my experience with the android OS from 1.5 onwards - all it takes is one rogue app or one very poorly coded app to totally lag down or destabalize the entire system.

I am having the same problem. My tab was lightning fast and even better when I oc. Now its lagging behind. I do not know if its something I installed or downloaded but when I found help ill let you know.
Sent from my A500 using XDA Premium App

Running apps without launch

Hello guys, ive juz got my iconia a few days ago.. its my first time using android. Its relatively new to me compared to apple. Ive notice that a few apps is running without me opening e application. is tis normal? ive tried to force close.. but after awhile it comes back up n running again?

What apps?
Wysłano z Acer A500

burnout69 said:
Hello guys, ive juz got my iconia a few days ago.. its my first time using android. Its relatively new to me compared to apple. Ive notice that a few apps is running without me opening e application. is tis normal? ive tried to force close.. but after awhile it comes back up n running again?
Click to expand...
Click to collapse
Generally speaking, yes, this is normal.
Those apps are put into standby and some apps run automatically like Systemupdater, Acer Sync etc... Other apps, like Photo Browser 3D, nemoPlayer, even Maps etc - will start but not in the sense of 'start' like we would think. They are ready states (as I understand them) and in some cases will stay ready or swap out when resources are getting light and the OS needs more headroom.
"By default, every application runs in its own Linux process. Android starts the process when any of the application's components need to be executed, then shuts down the process when it's no longer needed or when the system must recover memory for other applications."
So even if you don't launch and application manually, it could easy start up on it own if a component of it was executed (on some level).
It is not recommended to force-close applications unless the application is causing problems - in which case, uninstalling it is the better option.

gammaRascal said:
Generally speaking, yes, this is normal.
Those apps are put into standby and some apps run automatically like Systemupdater, Acer Sync etc... Other apps, like Photo Browser 3D, nemoPlayer, even Maps etc - will start but not in the sense of 'start' like we would think. They are ready states (as I understand them) and in some cases will stay ready or swap out when resources are getting light and the OS needs more headroom.
"By default, every application runs in its own Linux process. Android starts the process when any of the application's components need to be executed, then shuts down the process when it's no longer needed or when the system must recover memory for other applications."
So even if you don't launch and application manually, it could easy start up on it own if a component of it was executed (on some level).
It is not recommended to force-close applications unless the application is causing problems - in which case, uninstalling it is the better option.
Click to expand...
Click to collapse
yes those r the apps that has been running.. tried closing them by using android task manager.. for a moment it will juz start again..by uninstalling them, wats the risks of running my other apps? will it caused any problems?

burnout69 said:
yes those r the apps that has been running.. tried closing them by using android task manager.. for a moment it will juz start again..by uninstalling them, wats the risks of running my other apps? will it caused any problems?
Click to expand...
Click to collapse
I (though others would say the opposite) do not recommend uninstalling anything that came preloaded with the tablet. Both for stability reasons and future updates - if however you're really REALLY obsessing over getting back a dozen megabytes of allocated memory from those minor apps then you're going to have to go the whole long road down root avenue and backing up those applications etc ad nauseam. You can get all the info you need throughout the forum.
My advice is, don't worry about those native apps running in the background - if the OS needs more resources it will manage them on it's own. It's not like Windows where you can kill running programs or processes willy-nilly from the task manager when you want to free up memory - in Android, the OS does this as it sees fit, on its own. If it wants more juice, it will make more juice available to itself.

I had the same issues.. a quick fix i ran was to root my tablet and install "bloat freezer" from the market.
it simply stops the processes from running, so your not un-installing them just stopping them from running, Im now seeing my free ram running at appx 65% free at any time which is much better than before.
If i do want to use skype or whatever i simply unfreeze them and freeze them again when finished..
hope this helps..
<edit>
just to let you know i have frozen all of the acer bundled apps

Freezing apps is an option. I don't do that so I have no experienced opinion as far as that goes.

i agree with gamma
These apps are not really running. They are connected to context menues.like when younare in camera app and you click the share image menus.you will see the apps that can share the image such at Facebook Picasso dropbox and so on.these are the apps setting in static mode.I know in nor totally correct but its the closes I can do to describe.if your statement needs the memory or CPU cycles these apps might be using it will shut them down..I have tested this theory by launching many apps and logging processes.
task killers running in the background work against the built in memory and resources management's.
Good luck.if im wrong anyone please correct the post.just do so nicely
Don't make the blonde geeky chic cry giggles

yyiinn said:
I had the same issues.. a quick fix i ran was to root my tablet and install "bloat freezer" from the market.
it simply stops the processes from running, so your not un-installing them just stopping them from running, Im now seeing my free ram running at appx 65% free at any time which is much better than before.
If i do want to use skype or whatever i simply unfreeze them and freeze them again when finished..
hope this helps..
<edit>
just to let you know i have frozen all of the acer bundled apps
Click to expand...
Click to collapse
That does freeze those apps.but if the system needed that ram it would do the same.it gives foreground ape priority.if that or those apps need the resources.the system will kill the lowest priority apps.
Of course thee are some rogue apps that do not play fair.if you find them then uninstall.I use advanced task killer.but never let it run in background.just can launch it lookat what's running. Then close it it will not restart itself

I understand the memory management. But i would rather applications especially skype to run when i want and not as the system see's fit. Social jogger was another culprit they were my biggest bug bears..

yyiinn said:
I understand the memory management. But i would rather applications especially skype to run when i want and not as the system see's fit. Social jogger was another culprit they were my biggest bug bears..
Click to expand...
Click to collapse
You can freeze those apps with titanium backup.just remember to unfreeze before you do OTA. update

yyiinn said:
I understand the memory management. But i would rather applications especially skype to run when i want and not as the system see's fit. Social jogger was another culprit they were my biggest bug bears..
Click to expand...
Click to collapse
Those apps are not running. The may be started at boot but only partially, then they are "paused" and cached for quicker loading if needed.
Android does an awesome job at memory management and will kill apps when it needs more ram.
I dont like it either since i dont use social jogger, nemo player, acer sync and many more so you have two options
If you are rooted flash a rom without all that crap in it.
Or
Use a file manager with root access and file manipulation like 'rootexplorer' and rename those files so they wont run.
I rename them to socialjogger.apk.bak
Just adding the .bak to the filename is enough.
But dont piss around you can smoke the tablet and have to do a factory reset via recovery if you mess with the wrong file.
Just post a list of thing you wish to remove and we will be happy to let you know whats ok or not.
Oh and btw... the ipad runs a crap ton of stuff in the bckground too, apple jst desnt show you like android does.
Sent from my unknown using Tapatalk

2012 Nexus 7 So Slow It's Almost Unusable

This issue actually started before I updated to 4.4.4. I am currently on 5.02.
I have the WiFi version of the 2012 Nexus 7. I am running the stock Rom, and am rooted (using Wug).
I have several issues with this tablet, but by far the worst is it runs VERY slowly, sometimes taking 15-20 seconds or more to respond to my input.
I have tried doing a factory reset. The problem with that is that the tablet responded better for a day or so, but as soon as I set up my account it began downloading all my apps, making it impossible to determine whether one or more of them is responsible.
I have tried going into developer Options and checking the "Don't keep activities" option. That had no effect.
It's especially maddening when I'm trying to view web pages (using Chrome) and a page takes f o r e v e r to load. Then all those javascript ads that pop up just as the page finally loads (I tried deselecting that as well, but then I can't view slide shows, videos, and user comments on web sites).
It's also fun to click on a link, only to have the page jump right at that instant, resulting in the click hitting an unintended link!
At this point I am out of ideas, other than buying a different tablet, which I can't do right now due to financial reasons.
So my questions:
How do I troubleshoot the speed/lag issue?
How do I prevent my apps automatically installing themselves after a factory reset so I can install them one by one in an attempt to determine whether it's one or two apps causing this?
Is there a pop up blocker available for Chrome (or an alternate browser) to both block, or allow on a case by case basis those dang Javascript ads?
Thanks everyone.
Sent from my Nexus 7 using XDA Free mobile app

leebo said:
How do I troubleshoot the speed/lag issue?
How do I prevent my apps automatically installing themselves after a factory reset so I can install them one by one in an attempt to determine whether it's one or two apps causing this?
Is there a pop up blocker available for Chrome (or an alternate browser) to both block, or allow on a case by case basis those dang Javascript ads?
Click to expand...
Click to collapse
2 of these are easy, the other may take more work.
To prevent the apps from automatically reinstalling, open the play store as soon as the tablet boots up, go to my apps > installed, and click Stop. Then go to Settings in play store, and change auto-update apps option to "Do not update".
There's many adblockers out there, if you're rooted then you shouldn't have a problem installing them. I use AdAway and it works fine, Adblock plus is also popular. Just download the .apk for one you want to use and install it, run the app, then reboot, profit.
As for lag, though it's possible you have an app causing you some issues, this older device is also pretty well known for having a big problem with declining i/o performance over time, and this is more likely the culprit. But any apps that constantly run in the background can exaggerate this further, especially since we also only have 1GB of RAM on this device.
As you mentioned, a factory reset can sometimes help with degrading performance, but it will just degrade over time again through regular use (or as soon as a bunch of apps are immediately restored). This can sometimes be mitigated to a point by using fstrim, but this is not the final solution for everyone.
For me, converting to F2FS format helped with this a lot, it actually felt faster than when it was brand new initially. But it takes some extra work to make the conversion, especially the first time (you have to format your partitions, losing all data in the process, so EVERYTHING you want to keep has to first be backed up elsewhere then restored after conversion). You'll also need to install an F2FS compatible kernel or ROM. Do your research before jumping in if you go this route, and backup your data!

Thanks Prismatic.
I've seen a few posts from people complaining about the slowness of the OG Nexus. Since hardware like cpu's and Ram don't actually slow down (to my knowledge at least), I assume it's usually due to the larger size of newer apps? Like a Windows thing where a version seemingly becomes slower after several years because hardware requirements get more demanding?
But has Chrome for Android really gotten that much larger over these years to cause our little tablets to slow so much? I'm almost at the point where I use my phone (HTC One) more than my tablet for looking things up and browsing.
As far as changing file systems, I'll have to look into whether the community overwhelmingly agrees that the speed gain is worth such a drastic measure. Thanks for the input.
Sent from my Nexus 7 using XDA Free mobile app

Chrome has been a problem (along with Facebook) for my 2012 for a long time. When I did the 5.0.2 upgrade I did a factory reset afterwards about did not let it reinstall apps. I installed some fresh from the Play Store that were essential (none that run continuously) one by one. I replaced Chrome as the default with UC Browser which has Facebook Fast integrated (does FB notifications running in background) and all was like new. The only defect is that you don't have a "share to FB" in other apps. Haven't tried FB Messenger yet either. Beside the system/Google and cloud apps running in the background the major hits are Amazon Kindle and my password manager (50 and 35 MB). UCB (w/FF) are only 7.3 MB. Leaves about 500 free ram.
---------- Post added at 08:11 PM ---------- Previous post was at 08:01 PM ----------
BTW I only keep about a half dozen apps in "Recent Apps" and clear some out when it starts to lag a bit. The 2012 is not up to L's multitasking as L puts each tab or instance of an app there. Open a bunch of tabs in Chrome and you'll see what I mean.

I may try that myself. I already uninstalled FB (I've been suspecting it was a resource hog for a long time now).
I've been out of the loop for over a year though, what is "L"?
Sent from my HTC One using XDA Free mobile app

Let me guess: 16GB version? Those models used really crappy emmc that had a flash firmware bug where IO would get really slow once you hit 2-3 GB free space left on the device. If you're in that position, try freeing up space until you have 3-4GB free. It'll probably speed up again.

rtiangha said:
Let me guess: 16GB version? Those models used really crappy emmc that had a flash firmware bug where IO would get really slow once you hit 2-3 GB free space left on the device. If you're in that position, try freeing up space until you have 3-4GB free. It'll probably speed up again.
Click to expand...
Click to collapse
You are correct that I have the 16Gb version, but under storage it currently says, 8.5Gb free.
XDA Mobile App

Encrypted? If so, it wouldn't matter how much space you have free because as soon as the full-disk encryption operation completed, the internal map in the flash controller that keeps track of free blocks would think that there was no space left on the device (even though the OS and the file system would obviously report otherwise) and the only way to reset it once it gets to that point would be to reformat the file system (ex. Factory reset) which forces the flash controller to clear its internal map and start from scratch.
Either way, if your tablet is not encrypted and you're rooted, you could try to download the LagFix program from the Play Store and have it run fstrim, which would sync up the internal map of the flash controller with the current locations of free blocks of flash memory so the device doesn't keep slowing down trying to manually probe for free blocks every single damn time it needs to do a write operation. You may have to do it every once in a while as that internal map slowly fills up again though (the pro version lets you set a schedule). Theoretically, from Android 4.3 and onward, it's built into the OS and the the OS is supposed to be able to do it automatically based on certain conditions (ex. Idle for a certain amount of time, plugged in or 80%+ battery on a certain schedule), but I found that sometimes it needed to be done more often and it's always nice to be able to run the command manually if needed, although to be blunt, there's no reason why the end user should have to resort to this in the first place. That said, I don't know if LagFix will work on Lollipop (never tried; no longer have a rooted 16gb N7 due to a replacement logic board but a busted USB port so I can't unlock my bootloader to re-root the new board) and the program looks like it hasn't been updated since 2013. One way to find out, though and that'd be to try it.
Switching to F2FS as the file system rather than ext4 might help as well (I really wish I could re-root my device to try it for myself). The speed increases over other file systems when using it on flash memory come from letting the flash controller deal with the disk I/O rather than having the OS schedule things. When you look at the bug and what causes it, it could be the communication between the OS and the flash controller that's the culprit. So using a file system that cuts out the middle man and makes the controller deal with scheduling all the I/O might mitigate the problem (after all, the flash controller works fine when there's lots of free space, it's only when it fills up to less than 3gb of space that the flash controller's algorithm to sync what the file system advertises as free blocks with its own internal map starts to screw up).

I am not encrypted. I will try this LagFix app and report back, hopefully in next day or two. Do you recommend another factory reset first? Is been about three months.
XDA Mobile App

If you want, although I'd try LagFix first to see if that's all you need. If you do go through the wipe, run LagFix every so often to sync things up (assuming it works for you or on Lollipop in the first place).

OK, lagfix does NOT work on lollipop. It gives an error. When I can find the time maybe I'll try to convert to F2FS. Or else when I can find the money, try a new tablet.
Sent from a mobile device.

Question: When you wiped the device previously, how did you do it? If you're using TWRP and use the Advanced options under format to manually wipe /data and internal storage, it'll just use the rm command to delete the files which won't reset the controller's internal map. You need to use the factory wipe option, which will use the mkfs.ext4 commamnd to format the partition (which is what you want). If you've been doing it the wrong way, then that might explain why you're still getting the lag despite having a lot of space still free.
Also, the built-in trim functionality (supposedly) only triggers when the tablet is plugged in or at 70 or 80% battery *and* has been idle for 2-3 hours so if you use the tablet a lot or keep it powered off when not in use, there's a chance that the automated task won't run (and since LagFix doesn't work in Lollipop until the Dev updates it to be compatible, then there's currently no way to manually trigger it). So if you haven't already, try leaving it in powered on and plugged into the wall outlet overnight while you sleep and see if it's better in the morning. Might be worth a shot if all else fails.

Thanks. Yeah, I always leave it plugged in over night to make sure it's ready the next day.
I probably did do a factory wipe, but I'm not certain. Guess I'll try that again eventually.
XDA Mobile App

Cool. Well, if all else fails, there's one last trick to try, which is to zero fill all the empty spaces on the drive to tell the controller that the empty space is indeed empty when it hits the "start probing the file system for empty blocks to perform the write operation" part of its I/O algorithm. You can do that yourself on the command line by using dd to create a giant empty file until the drive is filled up, syncing the file buffers and then deleting the empty file, and then sync the file buffers one last time. There's also an app that can do it automatically, which is just a GUI that calls dd, rm, sync, rm and sync in the background. I forget the name, but it's in the store and I think it has "secure" as part of its name.
I had moderate success with that method as things would speed up again once done, but would slow up again over time as the drive was used. Formatting the partition is preferable because it saves on write operations and thus, wear and tear on the flash drive but the downside is that you lose all your data. And zero-fill was the preferred method outside of re-formatting the partition until someone figured out the fstrim trick. You might be able to run the fstrim command from the command line if you're rooted since LagFix doesn't work anymore on Lollipop, but I forgot what the command line arguments are. Google could probably help with that.
So still a few more things to try before giving up. But I wonder if F2FS would work better. Let us know if you ultimately go that route.

You can run the trim commands from terminal. But I found increasing the minimum clock helped.
Sent from my D6503 using XDA Free mobile app

leebo said:
This issue actually started before I updated to 4.4.4. I am currently on 5.02.
Click to expand...
Click to collapse
WOW same here, I updated from kitkat to 5.02 today and my god, this is TERRIBLE!!!
I keep rebooting in hope that SOMETHING will be better. I know this is an old tablet but I have a good mind to call Google tech support and complain about this abysmal ROM.
I did not do a wipe, just upgraded as you'd imagine that would be all one needs to do, it is a factory upgrade after all...
Some apps take forever to boot and then are inoperable because they can take a minute to respond to a touch (facebook seems the worst)
Others are very laggy but useable (like a cheap phone from 5 years ago).
I guess I have to try a factory reset/wipe.

So just to update: I have been wiping the cache partition about every five days. It lasts about two to three days. I plan on waiting until I have money to get a different tablet before getting a different ROM, or converting to the newer file system (though that will probably be some time from now). In its current condition I can't even give this thing away!
Sent from my Nexus 7 using Tapatalk

Same deal here. When new the Nexus 7 performs great. I have a 2012 8 gb version primarily for platform testing. The interface is so slow now I've given up and just use my phone. The keyboard takes forever to show up. When you first load an app it takes forever and switching between apps takes just as long. The last Nexus and Asus mobile device I will buy for a good while. At least I can still use it to test an app and know that the app will run on a crappy performing device.
Nexus 7 2012 (8gb)
Android 5.1.1
I've done factory resets and it doesn't really help, maybe for a few minutes and then back to the slow clunker. Even after the reset the keyboard is slow as snot to show up.

Just to update, I ended up using Wug's Nexus Root Toolkit to push 5.1 to my Nexus, then I did a factory reset. It had already downloaded 5.1 from Google, but I was desperate.
I had already given up and bought a Samsung Galaxy S 8.1 by then. It's now much faster. Because I bought the Samsung, I'm not using the Nexus very much, so I can't say for certain I cured it. It's worth a try however.
Signature edited to appease the OCD's

I would suggest installing Chroma 22/6/2015. It's very good since Android 5.1.1 fixes some memory leaks over 5.0.2 ^^ It runs perfectly P.S I wanted to sell or blow up my nexus with other roms so it's worth giving it a try ^^ I'd suggest wiping internal storage too after installation so you have a fresher feel ^^
Plz do it :3 You'll not regret it! The UI is pretty coolio too!