Originally Posted by piskr
It's fast. I used to use dalvik for about a week than switched to art. I've used art for more than a month now. I have a lot of third party's apps installed, even nonmarket ones. My Moto x is on 4.4 and rooted. I've never experienced any issue since I'm on art. Don't use Whatsapp or games though.
I'm not saying it won't work, used ART on my N4 and S4 but I'm skeptical you are going to see better performance with ART vs. the highly optimized dalvik libs used by motorola for the moto x. Especially since it's unlikely google has optimized ART for specific hardware at this point.
In my experience with ART on the N4 and S4, some tasks seemed quicker, some seemed the same and some felt slower but I definitely took a hit in battery life. I'm guessing ART on the Moto X would have a similar reaction, some tasks might seem a little quicker but I'm betting battery life is going to take a hit as well as other tasks that rely on moto x specific hardware.
I could be wrong though since I've never used a moto x (just ordered mine about 12hrs ago so I'm waiting impatiently)
32GB Woven Black, Black, Metallic Blue, GSM Unlocked Moto-X - Primary Phone
Samsung Galaxy S4 i337 KangaKat Secondary Phone | Google Nexus 4 (backup phone) KitKat