ART does open and make certain apps operate much faster but have got to give up xposed because it’s doesn’t support ART. Improvment of battery life isn’t really that significant for me though but I’m staying with it.
I always use ART, since it's one of the new things in kitkat, so don't want to miss it And Greenify is also great application which contribute to battery saving. So, I am currently using ART plus Greenify without Exposed.
But I really like Xposed which rich of feature and could improve our OGP performance
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