Why is IL2cpp ineffecient in Android?

Why is IL2cpp ineffecient in Android?
I build “IL2cpp apk” in unity5.5.2, and find the game consume power and get hot faster.
It dosen’t look like more effecient.
Did I do anything wrong or I need change some setting?

Have you profiled your game to see where time is being spent?

If not, that’s where you need to start.