I have Galaxy S4 and I'm trying to find the menu to switch to ART runtime, but I can't find it. The Android version is KitKat 4.4.2. Does Samsung disable this feature?
ART is not in the GS4 Developer Options. It's not compatible with the TouchWiz UI, so it was left off the GS4 update.
Go to settings > about phone > press build number / kernel version 7 times > back to settings and you find developer options > developer options > Runtime > ART > ok. That works for me.