The main benefit from ART on Android is having all of the code generated in advance and mapped from storage. There's no waste from code being generated at runti

The main benefit from ART on Android is having all of the code generated in advance and mapped from storage. There's no waste from code being generated at runtime in-memory. Wasting memory by generating code dynamically certainly hurts performance so claiming that a JIT compiler is always just as good is not true. There's room for a JIT compiler but the sanest baseline is mapping AOT compiled code from storage. It's way faster than a baseline interpreter and way lighter than a baseline method JIT.