Develop Bugs

[Q] Wifi Signal on AOSP ROMS

I have TERRIBLE Wifi signal strength on any AOSP ROMs (yes, I tested and radios, etc. are up to date). Anyone have this same issue and have a fix?? Sense ROMs are fine for me. I really want to use a few of these, but can't get over the terrible Wifi service.

oubravs2b said:
I have TERRIBLE Wifi signal strength on any AOSP ROMs (yes, I tested and radios, etc. are up to date). Anyone have this same issue and have a fix?? Sense ROMs are fine for me. I really want to use a few of these, but can't get over the terrible Wifi service.
Click to expand...
Click to collapse
I've been saying this for ages, hands down the aosp wifi sig can't compare to a sense rom. I believe the devs all know this and been aware. Question is, how come no one has done anything about it :-/. One of the main reasons I'm back to sense.
Sent from my Evo in your sisters closet using Tapatalk

Don't hate the devs they are the reason there is aosp roms
But I have not noticed this yet will try this
Sent from my gingerbread evo 4g

cesarcerros31 said:
Don't hate the devs they are the reason there is aosp roms
But I have not noticed this yet will try this
Sent from my gingerbread evo 4g
Click to expand...
Click to collapse
Definitely not having on ANY devs if that's what it sounded like I apologize. But I believe many are aware of the ****ty wifi drivers with aosp roms that's all I was saying.
Sent from my Evo in your sisters closet using Tapatalk

I have this problem as well. My AOSP will show 2 bars when three is full, even when one foot away from my router. Same goes for cell signal. If i am sitting at home i get about 2 bars on Sense, 0 on AOSP. And its not the "AOSP tells you the true signal" bs. When on sense it operates just fine. Restore an AOSP rom, no signal, no calls. It sucks, but i bear with it cuz i love that CM7. With that said, I sure later versions will be even better, and will address the issue. It seems pretty widespread.

Bump... same issue here.

oubravs2b said:
I have TERRIBLE Wifi signal strength on any AOSP ROMs (yes, I tested and radios, etc. are up to date). Anyone have this same issue and have a fix?? Sense ROMs are fine for me. I really want to use a few of these, but can't get over the terrible Wifi service.
Click to expand...
Click to collapse
I've noticed the same thing. I'm assuming the way Sense ROMS are woven into the framework of the phone is the reason for the difference in signal strength. I love AOSP roms but the signal quirks are just too much for me at this point to make the switch permanent.

Signal Strength - Touchwiz vs. AOSP

I noticed a significant difference in signal strength and resilience on TouchWiz roms as compared to AOSP roms. I've tried this on a number of radios (LJ7, LG8, LI3, LIH) and gotten the same results. I assume it's just perceived as I can't think of a reason why the rom would influence signal strength. Nonetheless, when I'm on TouchWiz I can walk all around my house and get ~-70 to -80dBm. On AOSP roms, if I leave it in a particular corner of my house I can get ~ -70dBm, but as soon as I leave that corner it shoots to -90+dBm (and subsequently boots me from LTE). Is there a reason that this could happen? Does it have something to do with the data handoff in TouchWiz vs. AOSP? Also, one thing to note is that on CM10 and 10.1, my Mobile Network Type is LTE:13 and on TW roms it's LTE:14. From what I understand, there's no real difference in LTE13/14 right? Has anyone else experienced this?

Interesting you mention this. I just posted a thread on a similar problem. See if this is your issue.
http://forum.xda-developers.com/showthread.php?t=2118098

ctasich said:
I noticed a significant difference in signal strength and resilience on TouchWiz roms as compared to AOSP roms. I've tried this on a number of radios (LI7, LG8, LI3, LIH) and gotten the same results. I assume it's just perceived as I can't think of a reason why the rom would influence signal strength. Nonetheless, when I'm on TouchWiz I can walk all around my house and get ~-70 to -80dBm. On AOSP roms, if I leave it in a particular corner of my house I can get ~ -70dBm, but as soon as I leave that corner it shoots to -90+dBm (and subsequently boots me from LTE). Is there a reason that this could happen? Does it have something to do with the data handoff in TouchWiz vs. AOSP? Also, one thing to note is that on CM10 and 10.1, my Mobile Network Type is LTE:13 and on TW roms it's LTE:14. From what I understand, there's no real difference in LTE13/14 right? Has anyone else experienced this?
Click to expand...
Click to collapse
I've also noticed this. On tw I can only get 3g when I'm at work in certain areas but when I'm on aosp I usually get lte although its only 2 to 4mbps its way better than the 1mbps I would normally receive on 3g

Please post questions in Q&A
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Ascertion said:
Interesting you mention this. I just posted a thread on a similar problem. See if this is your issue.
http://forum.xda-developers.com/showthread.php?t=2118098
Click to expand...
Click to collapse
Yes, this seems to be the exact thing I experience when on an AOSP rom. Anyone know what could cause TW roms to have a more resilient signal?
Sent from my SPH-L710 using Tapatalk 2

Samsung lies. Its in the cod to add another -20db
In front of a live studio audiencr

das_webos_transformer said:
Samsung lies. Its in the cod to add another -20db
In front of a live studio audiencr
Click to expand...
Click to collapse
This is actually what I was wondering. I wasn't sure if the dBm you see under About Phone > Status was raw data or processed data. Is there any evidence to suggest Samsung perhaps averages out dBm over time, so that it doesn't fluctuate as wildly as it would in a AOSP rom?

I'm not sure, possibly a root tool would be able to accomplish this. I have a widget that says my signal. However I'm on aosp. Not sure. I can get a link one sec
In front of a live studio audience
https://play.google.com/store/apps/details?id=com.cls.networkwidget

Service issues, what would you guys recommend?

Well I've been on AOSP ROMs for a couple of months now, and I love everything about them. The only thing I HATE is the service problems that come with them. So I switched back to the stock TW rom and updated my PRL and profile, my PRL went from 25012 to 25014 and my service at home (with an airave, mind you) was 3G and full bars. Thinking I had it all settled, I went back to AOSP and I'm still getting the service issues I had before: either I'm getting 1x + full bars, or 3G and 1-3 fluctuating bars, usually steady at 2 (again, this is on an airave, and my girlfriend with her iphone 5 has full 3G bars at my house). I've flashed every radio under the sun but they seem to make no noticeable difference.
Any ideas/suggestions? I'm not opposed to switching back to a TW rom...but I'd rather stay on AOSP. It seems to me that I have no choice though.

sevenpioverthree said:
Well I've been on AOSP ROMs for a couple of months now, and I love everything about them. The only thing I HATE is the service problems that come with them. So I switched back to the stock TW rom and updated my PRL and profile, my PRL went from 25012 to 25014 and my service at home (with an airave, mind you) was 3G and full bars. Thinking I had it all settled, I went back to AOSP and I'm still getting the service issues I had before: either I'm getting 1x + full bars, or 3G and 1-3 fluctuating bars, usually steady at 2 (again, this is on an airave, and my girlfriend with her iphone 5 has full 3G bars at my house). I've flashed every radio under the sun but they seem to make no noticeable difference.
Any ideas/suggestions? I'm not opposed to switching back to a TW rom...but I'd rather stay on AOSP. It seems to me that I have no choice though.
Click to expand...
Click to collapse
Are you certain about the strength of your signal on TW? I know that the original stock TW does a little trick in making you think that you have higher signal than you actually do (showing 3G when you really only have 1x... showing 4 bars when you really don't have a strong signal). It's best to compare the actual signal strength in dB (under System Settings - About Phone - Status). I know some custom TW Roms fixed this so that it's consistent with AOSP, but I don't know which ones have and which haven't (and if it's not listed in their features, it's hard to tell without diving into some code). I'm not sure if the iPhone does the same trick as stock TW does, but I know my wife's iPhone 4S typically gets worse reception than my GS3, so anecdotally, it doesn't.
On the other hand, if you're experiencing considerably slower speeds on AOSP compared to TW, it might be cause to stick with TW. Now-a-days, TW is creeping closer to getting the features of AOSP, so it might be time to switch back.

topherk said:
Are you certain about the strength of your signal on TW? I know that the original stock TW does a little trick in making you think that you have higher signal than you actually do (showing 3G when you really only have 1x... showing 4 bars when you really don't have a strong signal). It's best to compare the actual signal strength in dB (under System Settings - About Phone - Status). I know some custom TW Roms fixed this so that it's consistent with AOSP, but I don't know which ones have and which haven't (and if it's not listed in their features, it's hard to tell without diving into some code). I'm not sure if the iPhone does the same trick as stock TW does, but I know my wife's iPhone 4S typically gets worse reception than my GS3, so anecdotally, it doesn't.
On the other hand, if you're experiencing considerably slower speeds on AOSP compared to TW, it might be cause to stick with TW. Now-a-days, TW is creeping closer to getting the features of AOSP, so it might be time to switch back.
Click to expand...
Click to collapse
I should've added that I did compare signals under status and my signal reading was true. But I suppose you're right, time to learn all about TW roms.
Sent from my SPH-L710

sevenpioverthree said:
I should've added that I did compare signals under status and my signal reading was true. But I suppose you're right, time to learn all about TW roms.
Sent from my SPH-L710
Click to expand...
Click to collapse
There is one thing you can try (obviously Nandroid up before trying it). There's a thread that talks about poor 3G speed and the things you can do to fix it (not limited to AOSP or TW Roms, if I recall correctly). Here's the thread. I personally wouldn't flash the zip in the thread without look through it (I think it replaces your build.prop), but I would follow the steps in the linked thread to see if those tweaks will work.

So should I try the tweaks first and then resort to the zip?
Sent from my SPH-L710

sevenpioverthree said:
So should I try the tweaks first and then resort to the zip?
Sent from my SPH-L710
Click to expand...
Click to collapse
I'm wary of the zip because I'm not sure if it's for TW or AOSP roms (doesn't say in the thread). If I recall correctly, the zip is just a modified build.prop sysctl.conf which includes the tweaks from his linked thread. He just made the flashable zip so people won't have to mess around inside system files. But since I don't know if it's specifically for AOSP, I'd personally be a little wary of it.
Edit: Since it's not a build.prop and is instead a sysctl.conf file, it might be safe to flash. I haven't looked too much into this recently, but I'd less wary since it's not a build.prop file you're flashing.

topherk said:
I'm wary of the zip because I'm not sure if it's for TW or AOSP roms (doesn't say in the thread). If I recall correctly, the zip is just a modified build.prop which includes the tweaks from his linked thread. He just made the flashable zip so people won't have to mess around inside system files. But since I don't know if it's specifically for AOSP, I'd personally be a little wary of it.
Click to expand...
Click to collapse
I see, well thanks a bunch topherk I'll do my research and see how it goes
Sent from my SPH-L710

Hey OP... I don't know how phone savy you are lol, but........ here ya go.
Scroll half way down and do those tweaks.
---------- Post added at 02:19 PM ---------- Previous post was at 02:19 PM ----------
topherk said:
On the other hand, if you're experiencing considerably slower speeds on AOSP compared to TW, it might be cause to stick with TW. Now-a-days, TW is creeping closer to getting the features of AOSP, so it might be time to switch back.
Click to expand...
Click to collapse
Like which features?! I've yet to see that lol.

Joe0113 said:
Hey OP... I don't know how phone savy you are lol, but........ here ya go.
Scroll half way down and do those tweaks.
Click to expand...
Click to collapse
I'm guessing I use the "signal tweaks"?

sevenpioverthree said:
I'm guessing I use the "signal tweaks"?
Click to expand...
Click to collapse
Do this at your own risk and follow EVERY SINGLE STEP.. Read, read and read some more. And when you think you're done reading, just do it one more time! And yes, signal tweaks and you can even do NetSpeed Tweaks as well to increase data speeds.

You could use a tw ROM with morphology. I have that and the aosp launcher.
Sent from my SPH-L710 using xda app-developers app

WindroidApps said:
You could use a tw ROM with morphology. I have that and the aosp launcher.
Sent from my SPH-L710 using xda app-developers app
Click to expand...
Click to collapse
I might do that, and I did confirm that my TW rom isn't playing a trick on me, the readings are true. On AOSP I'm usually at 80-100 dbm and 2 asu, whereas on TW I was at 75 dbm and 8/16 asu. This makes me sad ): I tried every tweak mentioned in this thread but to no avail. Oh well, TW isn't so bad, I just really like AOSP.

sevenpioverthree said:
I might do that, and I did confirm that my TW rom isn't playing a trick on me, the readings are true. On AOSP I'm usually at 80-100 dbm and 2 asu, whereas on TW I was at 75 dbm and 8/16 asu. This makes me sad ): I tried every tweak mentioned in this thread but to no avail. Oh well, TW isn't so bad, I just really like AOSP.
Click to expand...
Click to collapse
TW always tells you your 1X signal strength even under status in about phone. AOSP is telling you your 3G or LTE strength so that's why it seems different. Download SignalCheck from the Play store & it should tell you your actual signal strengths.

[Q] Same carrier, two different phones, difference reception

I have my Galaxy S3 and my coworker has an HTC Evo. Both of us have Sprint and yet his phone gets 3 bars of reception whereas mine only gets 1, 2 if I'm very, very lucky.
AFAIK, he's running stock, unrooted and I'm running rooted with latest LiquidSmooth 2.9 with the MD4 modem. No idea what modem he has.
What could be the reason why he's getting better reception? Better antenna build in the Evo?

Volknochi said:
I have my Galaxy S3 and my coworker has an HTC Evo. Both of us have Sprint and yet his phone gets 3 bars of reception whereas mine only gets 1, 2 if I'm very, very lucky.
AFAIK, he's running stock, unrooted and I'm running rooted with latest LiquidSmooth 2.9 with the MD4 modem. No idea what modem he has.
What could be the reason why he's getting better reception? Better antenna build in the Evo?
Click to expand...
Click to collapse
Some of it has to do with the rom. Some aosp roms show a more accurate bar reading...which is why your's is fewer. I wouldn't really get to worked up over it. They both probably get similar reception and data speeds on 3g

lvpre said:
Some of it has to do with the rom. Some aosp roms show a more accurate bar reading...which is why your's is fewer. I wouldn't really get to worked up over it. They both probably get similar reception and data speeds on 3g
Click to expand...
Click to collapse
Actually, my data is absolute sh!te and it's a pain to load nearly anything. I get data transfer speeds in the very low kbps.

lvpre said:
Some of it has to do with the rom. Some aosp roms show a more accurate bar reading...which is why your's is fewer. I wouldn't really get to worked up over it. They both probably get similar reception and data speeds on 3g
Click to expand...
Click to collapse
I'm going to agree Ivpre. I would not get worked up over it. Unless of course it is necessary for you to have more Bars showing then him :silly: . You do most likely get the same Data Speeds.
Volknochi said:
Actually, my data is absolute sh!te and it's a pain to load nearly anything. I get data transfer speeds in the very low kbps.
Click to expand...
Click to collapse
I would suggest Updating PRL / Profile. Maybe even trying a different Modem. Not everyone gets great reception on MD4. You may have to experiment to see which works better for you.

If you want to properly know if your device is getting less of a signal you need to flash a TW rom, preferably one which is close to stock update prl and profile. Then check your signal and data speeds compared to your friends. AOSP roms remember are built from leaks, and ported from other devices. There is no true aosp source for the Sprint S3. So there's lots of patches and coding which goes into getting the cdma radios working.
Sent from the future via Tapatalk 4

prboy1969 said:
I'm going to agree Ivpre. I would not get worked up over it. Unless of course it is necessary for you to have more Bars showing then him :silly: . You do most likely get the same Data Speeds.
I would suggest Updating PRL / Profile. Maybe even trying a different Modem. Not everyone gets great reception on MD4. You may have to experiment to see which works better for you.
Click to expand...
Click to collapse
We've actually done a Speedtest together and his had a higher data rate than mine. I've had different modem with the earlier builds of Liquid Smooth as well, but still low reception. I've also updated my PRL/Profile in the past in hopes that it'll help but sadly no.
I'll look into having a TouchWiz ROM versus this one. I just love how LiquidSmooth is, so hoping I can find a TW ROM that's just as fun.
EDIT: I don't even know how to find a TouchWiz ROM. I figured it would say "TW" along the subject line, the same way AOSP does, but alas I cannot find that. I have heard of Goodness, is that a TW ROM?

Volknochi said:
I have my Galaxy S3 and my coworker has an HTC Evo. Both of us have Sprint and yet his phone gets 3 bars of reception whereas mine only gets 1, 2 if I'm very, very lucky.
AFAIK, he's running stock, unrooted and I'm running rooted with latest LiquidSmooth 2.9 with the MD4 modem. No idea what modem he has.
What could be the reason why he's getting better reception? Better antenna build in the Evo?
Click to expand...
Click to collapse
Some devices just get better reception than others. Better internal antennae.
My mom's old photon always got better reception than my 3d & s3
Sent from my SPH-I710 using xda premium

Volknochi said:
I'll look into having a TouchWiz ROM versus this one. I just love how LiquidSmooth is, so hoping I can find a TW ROM that's just as fun.
EDIT: I don't even know how to find a TouchWiz ROM. I figured it would say "TW" along the subject line, the same way AOSP does, but alas I cannot find that. I have heard of Goodness, is that a TW ROM?
Click to expand...
Click to collapse
Most likely cause all the roms which do not say AOSP or CM or AOKP or something like that are TW roms. I would recommend MOAR or TPR The People's Rom.
Sent from the future via Tapatalk 4

OP,
Unless you're being very careful with your comparisons and using quantitative, and not qualitative, data like db, seeing more "signal bars" means nothing.
Sent from my buttered S3

You must also keep in mind, that even after you switch to a TW Rom. There is no guarantee that you will see better reception. IE more bars. There are quite a few variables involved. What you should concentrate on is making your device the best it can be for you. As CNexus stated. When comparing you have to compare Apples to Apples, and Oranges to Oranges.
TEAM MiK
MikROMs Since 3/13/11

Bananas to bananas
Sent from the future via Tapatalk 4

To all Verizon Galaxy Nexus peeps! on 4.3

I have read conflicting reports that some say 4.3 is GOOD on battery for our VZ nexus and some say it was horrible....
what are your findings? better? worse? same?

Most battery comments are subjective in nature.
If you perceive worse battery life then try a different kernel or get a new battery.

dvigue said:
I have read conflicting reports that some say 4.3 is GOOD on battery for our VZ nexus and some say it was horrible....
what are your findings? better? worse? same?
Click to expand...
Click to collapse
Its always subjective. Try it yourself.
Sent from my Galaxy Nexus using xda app-developers app

I tried 4.3 and it was faster and with different kernel like mpokang it had good speed and battery life compared to 4.2.2. You just need to make sure you turn off wi-fi scanning even when off and something else in search or 4.3 will suck the battery down. My only complaint is my favorite ROM it's still 4.3 and the 3G to 4G tower switching doesn't work properly and as I travel allot this is a deal breaker for me as it drops calls so had to go back to 4.2.2 ROM. I heard the ROM's that are updated to 4.3.1 don't have the radio issues. This issue is also only on Verizon due to no new radio's yet from what I understand.

I've been using the Galaxy Nexus strictly on wifi for a while now. I recently updated it to 4.3, and while performance is GREAT, battery life is suffering, but I've felt no need to change anything because I'm always near a charger.

For me it's only been a bit of an improvement during regular every day use. Although If I try I can actually go almost a full day with one charge.

When i charge it peeps my phone

I was using 4.3.1 and battery seemed stellar. The radios is the big problem. It doesn't like bouncing between cells and 4G didn't seem to work.
http://droid-hive.com/index.php?/to...-aokp-sabermod-49-03-optimizations-11113-431/
His Rom was here but he recently moved.
-sent from my LG G2 using XDA Premium 4

I revisited slim 4.3 build 2 seems to be working good will see Monday when I go to work and start jumping towers. Really want to be on PA but didn't work good for me and hasn't been updated in awhile. Hopefully Verizon releases 4.3 and they will revisit and fix it. I think us toro users are not going to get a good kit kat because of Verizon radio deal
Sent from my Galaxy Nexus using Tapatalk

Lmao @4.3. Try 4.4 on ART. I've been on it all of a day but wow! You should have flashed 4.3 a long time ago. Its old news. Battery AND speed are crazy with ART. Could be placebo so I'm gonna wait a week or two to pass judgement but so far so good.

Mandelbrot.Benoit said:
Lmao @4.3. Try 4.4 on ART. I've been on it all of a day but wow! You should have flashed 4.3 a long time ago. Its old news. Battery AND speed are crazy with ART. Could be placebo so I'm gonna wait a week or two to pass judgement but so far so good.
Click to expand...
Click to collapse
Is that a Verizon rom? Because it's the Verizon that was only updated to 4.2.2 and has issues with 4.3+
I looked through the Verizon Dev forums but nothing as you described. If a 4.3+ rom has a fully working non-wonky cellular radio, then please link.
-sent from my LG G2 using XDA Premium 4

player911 said:
Is that a Verizon rom? Because it's the Verizon that was only updated to 4.2.2 and has issues with 4.3+
I looked through the Verizon Dev forums but nothing as you described. If a 4.3+ rom has a fully working non-wonky cellular radio, then please link.
-sent from my LG G2 using XDA Premium 4
Click to expand...
Click to collapse
Yes its a Verizon ROM. I don't think any of the 4.3 ROMs had RADIO issues. The Verizon Nexus was Updated to 4.3 through asop including Binaries so there shouldn't be radio issues.
A couple people are reporting issues with 4.4 but it looks like they didn't flash new radios.
Maybe we aren't talking about the same thing? Could you link what you are talking about?
If you want me to link all the ROMs with working radios on 4.3+ that would be to many ROMs.

The problems I have is low signal areas if I have good signal I have no problems on 4.3
Sent from my Galaxy Nexus using Tapatalk

tshelby73 said:
The problems I have is low signal areas if I have good signal I have no problems on 4.3
Sent from my Galaxy Nexus using Tapatalk
Click to expand...
Click to collapse
This is probably true. I don't have any problems in my home town but in was in another big city and I had great signal but often kept finding my phone unable to grab a data connection. I had to keep resetting to restore it. Toggling airplane mode wouldn't resolve it.
The only I could think of is I was going through a nonserviced area and dropping data and it never reconnecting.
-sent from my LG G2 using XDA Premium 4

Mandelbrot.Benoit said:
Lmao @4.3. Try 4.4 on ART. I've been on it all of a day but wow! You should have flashed 4.3 a long time ago. Its old news. Battery AND speed are crazy with ART. Could be placebo so I'm gonna wait a week or two to pass judgement but so far so good.
Click to expand...
Click to collapse
Not sure where the 4.4 comment came from...especially since there aren't any stable 4.4 Roms for the GNex yet.
I have bad battery on 4.2 and 4.3. Performance is better though.
Sent from my Galaxy Nexus using xda app-developers app

Mpokang with nephelims seem to give me better battery life on 4.3 vs 4.2.2 might be that you can only use 1080 version on 4.2.2 I use cm version on 4.3
Sent from my Galaxy Nexus using Tapatalk

nnbengboy2 said:
Not sure where the 4.4 comment came from...especially since there aren't any stable 4.4 Roms for the GNex yet.
I have bad battery on 4.2 and 4.3. Performance is better though.
Sent from my Galaxy Nexus using xda app-developers app
Click to expand...
Click to collapse
There are some slight graphical issues and reboots but for being dropped by Google the 4.4 ROMs aren't bad. Hopefully with the new GPU Binaries from TI those issues can get fixed.
The 4.4 comment came from the fact the OP is asking about 4.3 while 4.4 is being tested. I was pointing out he's a little late to the game and to get on it!! :silly:

Feels the same to me, same crappy GNex battery life lol
But it's not worse if that's what your wondering OP

Back on 4.2.2 4.3 still had some small data issues in low signal areas. Really the only thing I want is Bluetooth from 4.3 it works right and id tags come through to my stereo. Wonder if it can be back ported.
Sent from my Galaxy Nexus using Tapatalk

I've had my Galaxy Nexus almost since the beginning, and I've tried a lot of roms.
You probably notice a lot of stuttering and general slowness on your Gnex. The Gnex was fine on 4.0. Something happened in 4.1, and it became slow as death. The only thing that ever seemed to fix this was doing a factory reset on your phone, wiping the data, and reinstalling your rom. People came up with varying ways to fix this slowness problem (root always required, of course), including modifying the dalvik heap growth limit and readahead sizes. Other people used a program called LagFix in the Play Store that basically was a manual TRIM, because there was a problem with certain Samsung phones where they refused to trim the filesystem.
Jelly Bean 4.3 fixed all of that. Google committed some changes to the source that built trim into Android. To put it in perspective, my random read speeds on my phone were 0.4 Mb/sec before installing 4.3. My speeds now are 1.6 Mb/sec. Sequential read/write improved by an order of magnitude.
If you're not on Android 4.3, yet, you really need to do it. Android 4.3 helped my battery life not necessarily because it inherently consumes less power, but because it dramatically improved my I/O speeds; when my phone wakes, it doesn't have to wake as long to access random pieces of storage.
On top of this, ever since I can remember, the radio switchoff between Wi-Fi, 1X, 3G, and 4G on the Verizon Galaxy Nexus has been atrocious. Ever since I got the phone, it would regularly take me 30 seconds to a minute for data to come back up as soon as the phone switched to a different wireless standard. The latest Shiny rom (10/11/13) finally was able to fix that, so my radio switches happen in less than 10 seconds, now.
Finally, I've tried random kernels, including Franco, Trinity, Lean, Tiny, Golden, and GLaDOS. All of them have affected battery life and speed marginally and in various ways (and some of them caused me a lot of reboots after a week, or so, of use), but the one that has really--actually--improved the snappiness of my phone has been the BIGMEM version of Fancy Kernel. Fancy Kernel's thread is here; I'm running on version pre44-3-big.