I'm using LG G3 model D855 (UK model) bought from an operator in Thailand (Truemove-H). It runs on Dalvik as a default setting. I change to ART runtime. Now it's lag-free. Obviously better and smoother and I entered the hidden menu to switch off the "Fast Dormancy mode" to disable. and then the battery life is fantastic long lasting... From a week ago, there's no freeze or wake locked...
I think the ART experience may depend on the model variation. D855 works well
I think the ART experience may depend on the model variation. D855 works well