Difference between ART and dalvik runtime on KitKat rom

Shashank.sonth · Feb 1, 2014

what difference will it make if I change the runtime from dalvik to ART in developer settings in KitKat 4.4.2 ROM? Will it make my phone faster?!

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Skripka · Feb 1, 2014

Presuming ART on your device works...IME ART is much more snappy than Dalvik.

To read more start here:
http://www.androidpolice.com/2013/1...-in-secret-for-over-2-years-debuts-in-kitkat/

Shashank.sonth · Feb 1, 2014

While changing the runtime to ART it gives this warning, should I continue? what r the risks?

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Pons · Feb 1, 2014

http://source.android.com/devices/tech/dalvik/art.html

The risks are it's experimental technology that you're given a preview of because you enabled developer settings. Also, some apps may not work. And please don't file bug reports on the ROM or apps because you're using experimental settings. Honestly, I'd leave it on dalvik if you don't know what you're doing.

Skripka · Feb 1, 2014

The risk is that you may brick your ROM and need to do a Nan droid restore to get it back.

Shashank.sonth · Feb 3, 2014

I think I'll leave it as it is for now, don't want to risk bricking my device ?

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_Raziel666 · Feb 3, 2014

Skripka said:
The risk is that you may brick your ROM and need to do a Nan droid restore to get it back.

Stop giving false information!!! There's no case where using ART has bricked one's ROM (if that's even possible!).

Shashank.sonth said:
I think I'll leave it as it is for now, don't want to risk bricking my device ?

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There's no risk bricking your device by enabling ART. Sure some apps might not work properly, but the majority will work ok. You can always try ART, see what you think and if you don't like the results, you can revert back to Dalvik. Keep in mind that if you have Xposed framework installed and you try to change your runtime to ART, you might end up with a bootloop. So make sure you have a backup, just in case.

But, I repeat, it isn't possible to brick your device by changing to ART.

Skripka · Feb 3, 2014

_Raziel666 said:
Stop giving false information!!! There's no case where using ART has bricked one's ROM (if that's even possible!).

Lordy. Are you kidding me?

Of course it is possible...AAMOF, for most KitKat ROMs on the Sprint SPH-L900 enabling ART WILL render your ROM unbootable and the only "fix" (that I know of) is a Nandroid restore. AFAIK the only ROM for L900 with working ART that I know of is OmniROM, although I will admit I haven't tried straight CyanogenMod in forever. "Working" meaning enabling ART doesn't break your ROM. Because what will happen otherwise is after enabling ART and immediately rebooting, your ROM install will permanently bootloop, and the only way of getting it back is Nandroid recovery.

Don't believe me? Download or read the XDA forums for Dirty Unicorns 5.0 or SlimKat (no offense intended at Maz or sleshy who do mad work on those ROMs and who are more than aware of this issue). Then you'll see exactly what I'm talking about and that it is you who are "spreading false information". Further even within the same ROM, enabling ART can break the ROM for some devices but not others. If you read or follow Google+ dev communities for OmniROM and others you'd know this.

"False information" indeed.

_Raziel666 · Feb 4, 2014

Skripka said:
Lordy. Are you kidding me?

Of course it is possible...AAMOF, for most KitKat ROMs on the Sprint SPH-L900 enabling ART WILL render your ROM unbootable and the only "fix" (that I know of) is a Nandroid restore. AFAIK the only ROM for L900 with working ART that I know of is OmniROM, although I will admit I haven't tried straight CyanogenMod in forever. "Working" meaning enabling ART doesn't break your ROM. Because what will happen otherwise is after enabling ART and immediately rebooting, your ROM install will permanently bootloop, and the only way of getting it back is Nandroid recovery.

Don't believe me? Download or read the XDA forums for Dirty Unicorns 5.0 or SlimKat (no offense intended at Maz or sleshy who do mad work on those ROMs and who are more than aware of this issue). Then you'll see exactly what I'm talking about and that it is you who are "spreading false information". Further even within the same ROM, enabling ART can break the ROM for some devices but not others. If you read or follow Google+ dev communities for OmniROM and others you'd know this.

"False information" indeed.

bootloop ≠ brick

Two very different situations. You used the word brick, which does nothing but panick whoever reads it, because it insinuates bad things. On the other hand, a bootloop is a much more manageable situation.

Shashank.sonth · Feb 5, 2014

Could anyone tell me, if the device is bricked or struck on bootloop will I still be able to go to recovery mode?

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Shashank.sonth · Feb 5, 2014

_Raziel666 said:
Stop giving false information!!! There's no case where using ART has bricked one's ROM (if that's even possible!).

There's no risk bricking your device by enabling ART. Sure some apps might not work properly, but the majority will work ok. You can always try ART, see what you think and if you don't like the results, you can revert back to Dalvik. Keep in mind that if you have Xposed framework installed and you try to change your runtime to ART, you might end up with a bootloop. So make sure you have a backup, just in case.

But, I repeat, it isn't possible to brick your device by changing to ART.

what is xposed framework? how do I know if I've installed it?!

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_Raziel666 · Feb 5, 2014

Shashank.sonth said:
Could anyone tell me, if the device is bricked or struck on bootloop will I still be able to go to recovery mode?

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If your device is on a bootloop, you will be able to go to recovery mode. In case of a brick, in most cases you won't be able to turn the phone, let alone booting to recovery mode. But enabling ART has nothing to do with bricking the phone.

Shashank.sonth said:
what is xposed framework? how do I know if I've installed it?!

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This is Xposed Framework: http://xdaforums.com/showthread.php?t=1574401

You'll know if you've installed it, by checking if there's an app called Xposed Installer.

bleggy · Feb 6, 2014

I'm running art out of curiosity. everything is working fine, no problems at all. but honestly, I cant tell any difference between art & dalvik in terms of speed/battery life/whatever. the only noticeable difference is the longer boot time with art. I do not keep track of ram usage or do any speed tests or details like that. Maybe there's a difference on that level, but it's not perceptible as a user, imho.

so, at this time, is it worth switching over? eh, not really. doesnt matter much.

Shashank.sonth · Feb 7, 2014

Yeah even I switched to ART but didn't notice any changes except that all the apps take much space than dalvik n I also noticed my battery was draining sooner so switched back to dalvik, it's better for now until the ART is fully developed on our device

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honda kos · Feb 7, 2014

For me, art don't think that makes so much difference. It's experimental and we have to wait for next major android release.

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tim-13 · Feb 9, 2014

How do i know if I'm really using art? I've checked it and let it boot. Now when I go in the settings it says "using dalvik".

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bleggy · Feb 9, 2014

are you using xposed?

tim-13 · Feb 10, 2014

bleggy said:
are you using xposed?

Yes,so i think I'm on dalvik? Xposed shouldn't work when on art.

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FyendFyre · Feb 24, 2014

Xposed automatically kicks you out of art runtime whenever you try to get into it. so your options are:
1.keep xposed active and forget about art until the developer works on compatibility (which should be soon)
2.or deactivate (or uninstall) xposed and use art runtime.
You should weigh the pros and cons and see which is best. btw no bricks will happen if you choose to use art.

Difference between ART and dalvik runtime on KitKat rom

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