Custom kernel on stock rom xperia s question - Sony Xperia P, U, Sola, Go

Hi all, im noob in flashing, custom kernel thingy.
Now i use ICS 4.04 stock rom stock kernel, and rooted.
Im rather disappointed with sxs perform in games. In mega jump when it collect coins, it rather lags. In 3d game like shadowgun and modern combat, it is stutter. And my nenamark2 score is quite low. Only 29 fps ( i ask this score in forum, but still no replies
http://forum.xda-developers.com/showthread.php?t=1832023)
Thus i began to try custom kernel. So here is my question:
1. Does custom kernel improve in game performance without overclocking it? (im going to try advanced stock kernel by arakmar)
2. After flashing with custom kernel with stock rom, do i need to root my phone again or it is already prerooted?
3. If i do factory reset, does my kernel will go back to stock one? How about root? Does root gone when the phone is factory resetted?
4. When i perform custom kernel flashing, does my data in my phone memory always gone?
Thank you

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ziedrich said:
Thus i began to try custom kernel. So here is my question:
1. Does custom kernel improve in game performance without overclocking it? (im going to try advanced stock kernel by arakmar)
2. After flashing with custom kernel with stock rom, do i need to root my phone again or it is already prerooted?
3. If i do factory reset, does my kernel will go back to stock one? How about root? Does root gone when the phone is factory resetted?
4. When i perform custom kernel flashing, does my data in my phone memory always gone?
Click to expand...
Click to collapse
1. it may improve, not assured though
2. not needed. In fact, when I flashed this kernel I ended with 2 "root" apps: superuser and superSU, so I disabled one.
3. I don't know
4. no, all user data (apps, etc) remain

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1) The developer of kenal will clearly explains the improvement after flashing a kernal. So choose kernal wisely
2) I think Rom only comes with prerooted , but kernal maintains the power supply and cpu frequency
3) While u factor reset only rom what u have flashes will reset but kernal remain same
4) NO. All ur data in sd card and even in internal memory doesnt go away
Source
My Experiance...

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when u used factory reset, you will still have your root, the only thing thats gone are the apps that u installed. and your kernel will not be affected, its still the same.

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peksalvo said:
1. it may improve, not assured though
2. not needed. In fact, when I flashed this kernel I ended with 2 "root" apps: superuser and superSU, so I disabled one.
3. I don't know
4. no, all user data (apps, etc) remain
Click to expand...
Click to collapse
PrakashGD said:
1) The developer of kenal will clearly explains the improvement after flashing a kernal. So choose kernal wisely
2) I think Rom only comes with prerooted , but kernal maintains the power supply and cpu frequency
3) While u factor reset only rom what u have flashes will reset but kernal remain same
4) NO. All ur data in sd card and even in internal memory doesnt go away
Source
My Experiance...
Click to expand...
Click to collapse
mharckk said:
when u used factory reset, you will still have your root, the only thing thats gone are the apps that u installed. and your kernel will not be affected, its still the same.
Click to expand...
Click to collapse
Hi all thanks. Now ive already flash withvarakmar custom kernel. The first time i do benchmark with nenamark the score is better 35 fps. However, after i use it, reboot it, install app, then do nenamark again, the score goes down again to 29 fps . Any ideas why this happen? Is it because the setting or whatsoever?
Any recommendation for custom kernel that can increase 3 d rendering? I see that some customer kenel can overclock cpu to increase benchmark score. Does overclocking cpu, increase in game 3 d rendering performance?

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in stock rom they underclock CPU to 810MHz when the cpu temperature goes to 55 Celcius. There is a way to change that into a higher temperature