yashsingh1/xdaforums huggingface dataset:
[Nexus 7 General] Jay Aristide:
The difference between a Snapdragon4 and a Tegra 3 is staggering. A good deal has to do with the processors themselves, but the biggest difference is between the MALI GPU in the Nexus4 and the GeForce GPU in the Nexus7. The GeForce just can't come close to the MALI. It's funny, to me, that the company that reigns supreme atop the desktop graphics market is so lacking on embedded devices..

Also, take into account the Nexus4 has twice the ram of the Nexus7, and the 4's ram is faster/better.

Given the n10 is a Samsung device, and it's price isn't nearly as 'on-the-wire' as the Nexus4, I would assume it's build quality is top notch. Samsung surely isn't known for making junk...
[Nexus 7 General] Bobbyballbags:
As a nexus 4 and 7 owner I obviously notice a massive difference in performance between the two devices. But to write the nexus 7 off and say the lag is down to the fact it is underpowered is garbage. It was performing fine until 4.2, at least in my experience.

I have reverted back to stock 4.1.2 and then on to 4.2 and ota to 4.2.1 and.... Dare I say it, it seems to be a bit snappier. I'll report back in a couple of days but after a couple of hours I'm much less annoyed than I have been over three last couple of weeks.
[Nexus 7 General] Jay Aristide:
Right on. I'm not really writing it off to that, just saying there really is quite a difference in hardware
[Nexus 7 General] khaytsus:
I know my Galaxy Note felt really fast until I got my Nexus 7, then it magically felt slower. ;)
[Nexus 7 General] matt30:
I have the same problem. From a reboot, doing nothing else, opening Google now to search for something lags the entire device and persists even after leaving google now. Also, widgets on the home screen flicker often when I return to the home screen. This problem does not happen on my Galaxy Nexus running CM10 with the same apps. I have the 8GB model with HD widgets. Like some people have said, I can almost type an entire sentence in an app before the letters show up on the screen.

Also, Currents is not the issue and I'm sitting on about 4 GB of space left. This is not occasional stutter.
[Nexus 7 General] rmm200:
With all the people saying HD Widgets causes a problem, I don't understand why you don't try uninstalling it and see if it makes a difference.
[Nexus 7 General] rootusr:
That fixed the random reboots issue on my n7 with android 4.2.1, however the horrible LAG continues randomly... still more than 8GB of free space, something is wring with this android version,

Does anyone have tested a 4.2 rom that does not suffer of this horrible lag?
[Nexus 7 General] andrewdroid:
I downgraded to 4.1.2 now, then rooted. It seems so much faster. Not sure what happened with 4.2
[Nexus 7 General] sayantandas:
android 4.1 for nexus 7 3G

Hi all,

I'm experiencing all these lags on the new nexus 7 3G version. I'm running Android 4.2.1. Since i have heard Android 4.1 was lag free, I was wondering if there is any Android 4.1.2 build available for the 3G version .
[Nexus 7 General] androidkid311:
I think its possible to root and downgrade to 4.1.2. When I get my n7 I'm sticking with 4.1.2. I'll wait for 4.2.2.
[Nexus 7 General] knitler:
The 3G shipped with 4.2.1. I dont think that 4.1.2 will work for it.
[Nexus 7 General] sayantandas:
That's not true. I think ut shipped with 4.1.1 . I remember that the upgrade to Android 4.2 popped up when I was setting up my Nexus 7 for the very first time. I have a picture of that as well. Here is the link https://plus.google.com/113260014754281263350/posts/KPXCcJ1JAZg
[Nexus 7 General] PMOttawa:
You are correct. There was a ton of discussion about it here too.
[Nexus 7 General] DarkSankaku:
Good luck finding a stock ROM for it. Google seems to only provide the 4.2.1.
[Nexus 7 General] timfimjim:
Have you all tried factory reset? It fixed most of my problems.
[Nexus 7 General] Bobbyballbags:
Factory reset did nothing for me. Full wipe and manual flash of 4.1.2 and then 4.2.1 seems to have improved performance but it still ain't like it was.
[Nexus 7 General] sayantandas:
How did you get Android 4.1.2 for Nexus 7 3G? If you have any link, please direct me to that page
[Nexus 7 General] AuxLV:
I've compiled fstrim for Android and packaged it inside APK with nice GUI. You can find LagFix tool here. This fixes lags when you fill /data partition.
[Nexus 7 General] Metallice:
FYI in 4.2.x the nexus 7 mounts with discard in the ramdisk, and if you don't have one of the affected storage chips, the Nexus 7 kernel makes it so the discard option does nothing. So this would really serve no purpose on 4.2.x.

However, for those sticking with 4.1.x this can be benefitial for those with the affected storage chips.

Sent from my Galaxy Nexus
[Nexus 7 General] AuxLV:
I'm using CM10.1 and I'm affected. This is why I made it. Maybe original kernel from Google works the way you say, but I have this issue with default from CM.

I'm glad that most people are not affected, sadly I am. I got extremely poor IO still having 9 gigs of free space (I have 16gb model). I also have it on my HOX, but I was fighting it with /data backup/format/restore from recovery. /sdcard is separate there, but not on N7. Other solutions did not help me...
[Nexus 7 General] Metallice:
It's entirely possible that CM10.1 never added the discard option to their included ramdisk. I remember for a long time after CM10.1 nightlies started being built CM had yet to update their ramdisk to include discard, and it was quite annoying at the time as they had been building for 4.2 for a while.

I figured by now they would have fixed that and added discard, but I guess they didn't.

(M-kernel of course supports CM10.1 and adds discard to to ramdisk :D )

Sent from my Nexus 7
[Nexus 7 General] AuxLV:
OK, thanks for info. I'm using N7 just a few days, so I don't know yet what is happening in this community. And got hit hard by IO...
[Nexus 7 General] bftb0:
FYI by chance I happened to have the 01/14 CM10.1 nightly installed; both /cache and /data are mounted with discard.

I found this blog post was rather informative, if a little dated. Seems like some measurement data might be needed - with and without the mount option in use.

cheers
[Nexus 7 General] androidkid311:
I finally got my nexus 7. Second one and its flying! Got the 32GB 3/G model. I'm lucky. I was nervous when I opened it that says a lot about the QC lol. They seemed to have drastically improved it.
[Nexus 7 General] AuxLV:
Yes, I've read it too.
[Nexus 7 General] HotInEER:
I have had nothing but issues with my Nexus 7 I got at launch. I have the 16gb version also. Same issue as everyone else, I loved it for a few months, no issues and had about 4 gb of space left and then bam, moved slower than a car with no tires. I have had to factory reset it 10 times at least and the same thing happens over and over. Works fine for a while and then bam, now it's moving even slower and i'm having wifi issues, will not stay connected and I have 8 gb of space left. I even deleted apps and it's still a no go. I was going to root it but I see people are having the same issue even with root.

I know one thing, I will never buy another Asus product again, I have been burned by them by 4 different tablets and will never make that mistake again. It was bad enough they lowered the price by $50 a few months after it had been out, but the problems are even worse. I see people have called Google and got no where, so i'm not even going to bother. Tempted to go buy a new 32gb one and then switch mine with that and take it back to the store and get my money back. I feel since Google/Asus screwed me, I should return the favor.
[Nexus 7 General] BrianDigital:
give them a call, I had an issue with mine, advance replacement was sent, the whole thing went rather well
[Nexus 7 General] JaZart:
Does anyone else get really bad lag when updating /installing apps?
[Nexus 7 General] AuxLV:
Everyone on every device. Even on Apple devices (:
[Nexus 7 General] Cor-master:
I'm not going to lie my Nexus 7 has been less than buttery since the 4.2 update. Kinda sucks, I hope Google can patch it
[Nexus 7 General] androidkid311:
You me and several hundreds of thousands of users hope so. Especially the Bluetooth playback, its embarrassing!!!!
[Nexus 7 General] jocke_lulle:
Sv: the LAG thread --__--

I do! Didn't have this before 4.2 though. I really hope for an update from Google soon! There are some strange things with 4.2 & 4.2.1...

through Tapatalk HD with my Nexus 7
[Nexus 7 General] tylercarter:
unchecking sync in the backround in google currents did nothing for me....plus its silly to expect that to reduce lag.

Instead i saw something somewhere about an app called lagfix. Solved ALL my lag issues. Also dont check /system. Just leave it as is and run it. Here is the link.

lagfix
[Nexus 7 General] .torrented:
Not not my droid DNA :P
[Nexus 7 General] Cor-master:
That'll help you with battery life, not lag though.

I've tried about everything. I can get rid of the lag a little bit but it comes back. Honestly it seems to me memory management is borked on it right now. More times than not now if I clear our my recents it'll get rid of most of the lag. But my understanding is android is supposed to manage memory where it doesn't matter how many tasks you have running, hence why all the developers cautioned against task killers. I've tested there theory and found that to be true... Except on the nexus 7 with 4.2. Now it's like we're running windows! Wth Google?
[Nexus 7 General] jadephyre:
I don't get lag during normal use, just when I install a new program, but then again that is nothing new, as I experienced that on all my android phones & tablets so far.
[Nexus 7 General] Cor-master:
I think I figured out the best fix for now until google every gets off their lazy asses and gives us 4.2.2, turn the tablet off before you charge. Seems to me if you leave it on the lag will get worse and worse until I feels like your using a nook color with jelly bean on it! Memory leak I suppose. But a reboot will fix it.

Hell I dunno probably taking a stab in the dark, every lag fix I try only works momentarily and then the lag comes back. It's not lagging now, give it an hour, it probably will be again!
[Nexus 7 General] ebcase:
My N7/16GB has been experiencing all these lag/sluggishness issues for months, and I've tried everything I could find — trimming disk space, disabling Currents, even factory-resetting and starting fresh. Just got 4.2.2 a few days ago and it's still slow as can be.

One of the comments earlier in the thread suggested calling Asus to ask for a replacement, and I just emailed them via this form:

[ http :// www [dot] service [dot] asus [dot] com/#!Tech Support Mailbox/c1l8j ]

Will post again with how it goes. Will ring them if I don't get an email response.
[Nexus 7 General] androidkid311:
I got the 3G model in January and its fine.. Not laggin all other place. Running PA 3.0 and the one and only motely kernel. As the post above me suggests you may truly have a defective unit.
[Nexus 7 General] _Toprak_:
For me it's smooth as it could be, I have a Galaxy S2 also, most of the time my Nexus 7 is faster than S2 (obviously) but it gets really sluggish when I set a live wallpaper for Nexus 7..I don't know why and there's nothing to cause this, Google Currents background synchronization is deactivated, I got no widgets and only e-mail synchronization is running all the time that's all..When I set the same wallpaper for my S2, it handles perfectly but I guess that's because of the screen resolution I don't know but still it's weird. In fact, I used to have an LG Optimus Black (P970) and strangely even it was handling those live wallpapers better..But other than that, I got no problems with my Nexus 7 so far.
[Nexus 7 General] ram130:
certain live wallpaper just don't take advantage of the GPU on tablets..try the Xperia live wallpaper...it's smooth no matter what.:good:
[Nexus 7 General] fzammetti:
I was thinking of wiping tonight so that's no problem... I can't live with it like it is now certainly and maybe we'll get lucky and find some common problem that helps others too. Give me a few hours, I have to save some stuff off first.

Thanks Jay, I'll be back in a bit.
[Nexus 7 General] Jay Aristide:
Don't thank me, yet.. We've no idea if this will get us somewhere or just waste several hours of your time, heh. That being said, I'm sure everyone here really appreciates it :)
[Nexus 7 General] Tired of the Bull:
Thought you might like to see what a custom ROM and Kernel gets. I'm running Glazed ICS with Motley+.
[Nexus 7 General] Jay Aristide:
Nice :). I'm running stock 4.1.1 w/motley's, /data remounted noauto_da_alloc, interactive/deadline, 512mb zRam, fsync disabled, DPI set to 160, ~1.13gb free on my 8gb n7 @ 1.3ghz/416mhz GPU, undervolted by 100mV..

When I set 1.6ghz and use the 520MHz GPU kernel with performance/deadline (still @ -100mV), I quad 6200+ consistently, mthread linpack at 58+, vellamo at 2210, and nenamark2 64fps... So far I've only found one game that makes the n7 stutter the slightest at default clocks (Dangerous HD, full settings, colorful sky (black sky doesn't stutter at all)), so I've been staying there for better battery life :)
[Nexus 7 General] fzammetti:
Just a quick update: I'm getting ready to wipe (have a few more files to back up first), but before I did I decided to come at it from the other way and remove some apps... I chose apps that had service processes running first, those I had myself installed first. I removed a couple, and it made no difference... but then I removed PowerAmp and all of a sudden I'm getting read speeds on par with what everyone else is posting and overall noticeably snappier performance.

My write numbers however are still right around what they were before, horrible, so there's still an issue.

But, if anyone else is having issues and you have PowerAmp installed, uninstall it and see if you have an improvement too. Could be a problem app on the Nexus.

FYI, I ran the benchmark about five times after uninstalling it, before AND after a reboot, and the read numbers were consistently good, and the write numbers consistently bad (SQLite performance was still abysmal across the board, but note that all of the tests AndroBench runs for it require write operations, so I'm not exactly surprised by that).
[Nexus 7 General] Jay Aristide:
Out of thanks for the day, so here's a high-five. Let us know how it goes after the wipe. Don't forget to wipe cache and reset from recovery, too :)

PS I plan to buy that game on Friday. Looks fun!
[Nexus 7 General] fzammetti:
Good deal, I hope you enjoy it!

And hey, just did the wipe and guess what? Numbers are good across the board!

I haven't rooted yet, although I'm going to (I was holding off before because I didn't want to wipe, but now that I HAVE too it's a no-brainer). If it stays like this then all is right with the world, but after I root and start installing apps I'll be sure to run the benchmark frequently to see if I can pinpoint when it goes to ****, if it does.
[Nexus 7 General] Jay Aristide:
Very happy for you!

Awesome, man! Glad you're good across the board. Flip back to page 6 of this thread after you root and follow my recipe for buttery goodness. Feel free to over/under clock/volt to your preference. I promise you'll absolutely LOVE the results :)
[Nexus 7 General] bso44:
Btw, which 1.1.1 kernel are you running?
[Nexus 7 General] Jay Aristide:
416MHz GPU. I see no reason at all to overclock this beast
[Nexus 7 General] bso44:
Gotcha...thanks.
[Nexus 7 General] androidkid311:
Very very true.
[Nexus 7 General] Toast95135:
I noticed it was lagging really bad last night and it never had before. I checked my storage space and I was down to 1.25gb's. I freed up some space and it's back to it's speedy self :good:

I've never noticed any of my other Android devices get laggy when they were almost full though.
[Nexus 7 General] farmerbb:
Just wanted to put a good word in for the Motley kernel and Jay's tweaks on page 6 of this thread. They helped significantly decrease the amount of lag that I've been having, and even increased my boot times as well. If you put in the effort to get it all set up you'll see that the results are just amazing. :)
[Nexus 7 General] Jay Aristide:
I got a little busy, today, and will have those i/o bench templates up tomorrow, sometime. Hopefully we can nail down whether the problems people are seeing with i/o lag are software-based or a manufacturing trend...
[Nexus 7 General] androidkid311:
Goosh I really hope software based :-/.
[Nexus 7 General] Jay Aristide:
Me too, man. Me too
[Nexus 7 General] Cor-master:
No lag here, except for the launcher a tad bit, but that's because I'm using nova beta, stock one is fast, but doesn't auto rotate. Had to be a defective unit, bad RAM perhaps? I had a bad video card on my PC and it lagged and randomly locked up in windows, at its core the nexus 7 is a pc too that runs android so that could be the cause
[Nexus 7 General] rock7632:
I had minor lag when I first got mine. As soon as Google released the factory image, I flashed it and its been absolutely perfect since then
[Nexus 7 General] G1_enthusiast:
i can attest to this..
[Nexus 7 General] parmend:
Mine will get laggy out of nowhere . Home screen swiping will get really choppy and I have to kill all the apps or reboot for it to stop. Other than that its buttery smooth . Idk if its a bug but I hope Google will fix it .
[Nexus 7 General] jamesst20:
No lag issue on my side, 100% stock. Make sure you're on 4.1.1 since it is really much smoother then 4.1
[Nexus 7 General] Valkyrie743:
Chrome lags big time while scrolling. I just installed cm10 nightly and I'm now using the old stock btowser and now its nice and smooth. Chrome late a little less in this ROM but I still pretty bad conspired to stock browser and even my iPhone.
[Nexus 7 General] androidkid311:
How is cm10?? :)
[Nexus 7 General] MrCheesecake:
Getting rid of the play store widgets got rid of my lag
[Nexus 7 General] davp:
Hi Jay, thanks for all these anti-lag tips in one post. Just a small correction, on my device the fsync_enabled is in /sys/class/misc/fsynccontrol. You might want to edit that excellent post on page 6.

I didn't have a lag problem, but these tips are noticeably faster.

Cheers
[Nexus 7 General] Jay Aristide:
Yikes! Thanks for poitng that out, I'll go fix it right now.
[Nexus 7 General] farmerbb:
Jay, while we're on the subject of fixing up the speed/ram tweaks script... I noticed that the values for zRAM (100*1024*512) only give 50MB of swap instead of 512MB like you say. In my script I went ahead and changed it to ((1024*1024*512)) so I can get the full 512MB of zRAM, and it's been working out great (free command in terminal reports that it'll often use at least 150-200MB of that under heavy multitasking). I guess I'm just not familiar enough with zRAM to know how much I should be using on the Nexus 7. Either way, that script has really been helping me with my lag problem and I'd love for it to become a commonly-used resource on xda for helping to fix any lag issues that we're having.
[Nexus 7 General] Jay Aristide:
And, that's why I LOVE this community :) Thanks for pointing that out, I'll update the post immediately. You guys think I should copy that post to it's own thread?

It has it's own thread on AF
[Nexus 7 General] bso44:
Definitely deserves its own thread :good:
[Nexus 7 General] Logan_M:
The only time I've had any lag was when I was downloading things from four different apps. Other than that smooth as butter.
[Nexus 7 General] darkchazz:
I get a little stutter every now and then, for example when I wake the device the first swipe I make gives a little stutter but after that everything is smooth.

Also, wish they included the stock android browser because chrome is just laggy, especially on heavy websites, and I hate how it scales up text.

I downloaded Dolphin browser and it is way smoother.

One more thing... Tegra 3 is hyped too much... seriously.. reviewers everywhere calling it "powerful" and "screamer".

nVidia is touting all this Tegra 3 gaming nonsense, yet the exynos quad in my GS3 completely leaves tegra3 in the dust in all games I have tested.

and some games like riptide and gta3 use lower resolution by default to get more fps :/
[Nexus 7 General] bso44:
Here's my Androbench after applying the zRAM and fsync tweaks that Jay Aristide posted on page 6. I didn't really have a problem with lag but now my N7 is absolutely flying! Only minor annoyance is that my System Tuner settings won't stick after a reboot.

And here's my Androbench before I did the tweaks for comparison:
[Nexus 7 General] eddierab:
One more person having the random lag issues. Mine started sometime after pinning the transformers movie and a couple of books.
[Nexus 7 General] kieso:
Wow that's impressive. Its time to root for me!
[Nexus 7 General] Jay Aristide:
[GUIDE] Jay's Recipe for Buttery Goodness (cross-posted from AF)
[Nexus 7 General] linkinparkfan007:
I think android isn't invincible from last but it is still officially better than the transformer prime on ics
[Nexus 7 General] dudinatrix:
So there's no fix for this still, right? My Nexus 7 is just no longer fun to use. Apps take anywhere from 3-15 seconds to load, even if they're already in memory. Chrome is crazy slow. Google Now is more like "Google In 13 Seconds". It's unresponsive, lots of white/black screens while loading, force closes, etc. Many times once I'm eventually inside an app, that app may work well (such as games, Currents, etc..)... the initial app load and responsiveness is what's especially slow.

I'd do a factory restore but based on what I've heard it doesn't really fix it, right? The only bit of hope I've found was in another discussion thread, but it is one single comment from a random person and I haven't heard anything else about Google acknowledging this and a future update or anything along those lines. Anyway, the "hopeful" post is here: http://forums.androidcentral.com/general-help-how/202711-nexus-7-running-very-slow.html

Does installing a new kernel fix this problem permanently? I'm still stock/unrooted, and I'd really prefer to stay that way. I loved this thing until it stopped being responsive.
[Nexus 7 General] larzy:
Yeah I'm having the same problems. I tried factory restore and stopping all background synchs which helped a bit but it still happens for periods at a time...usually in half an hour periods. I have noticed that running benchmarks when this happens that the write speed of the IO is the issue. When its running OK the IO write speed is much , much higher.

I'm going to investigate the rooting and custom kernel idea as I've got a minor crack on my screen so I figure my warranty is void now anyways.

Understand your frustration... I just end up going back to my nexus phone which never misses a beat
[Nexus 7 General] pritsey:
Happening to me as well. Stock ROM, 16gig N7. Its so laggy that I can't really use the thing. I get the force close/wait message constantly, even changing the volume doesn't happen straight away. I don't want to have to keep factory resetting and reinstalling every few weeks. Selling it might be the only option ....
[Nexus 7 General] Cor-master:
Google used tegra because it's a cheap quality quad core, but I agree it's over hyped. I'm not experiencing any lag but would be nice to have a snapdragon s4 and have all the games show in the market. It's my understanding tegra chipsets own if the game is optimized for them, otherwise they will underperform