Comment by surajrmal

The vast majority which lives in android userspace. The customer compositor, input stack, wlan daemons, etc, are all tuned and optimized for power efficiency. Also, these days, there is a lot of hardware controlled directly by userspace - it's not just the GPU. And those hardware are generally important for offloading a lot of conpute and reducing wake ups. Things seem to only be trending further in this direction.