Bug: live wallpaper sample seems to take more CPU, and use it even when screen is turned off

Compared to this, it uses more CPU : https://github.com/huzongyao/AndLibNsgif

And, after making a better code than what they have for viewing GIF (here) and especially pausing it, I got to 0% CPU:

, while on "android-gif-drawable" sample of live wallpaper I can see it still uses CPU, even when the screen is turned off :