800MB free RAM yet home screen redraws?
This is a rather old question but Nova Launcher has an option to stop (most) redraws.
It can be found in Nova Settings &gt; Advanced (at the bottom of the list).
It reads:

Aggressive desktop
Persistence, caching, and preloading to reduce redraws. Comparable to Keep in Memory option of Android 2.x launchers.

It's not a good idea for phones with low RAM (&lt;=1GB), but if you have 800MB free (so, assumingly, your phone has 1.5 or 2GB), it should be just fine.
There should also be (persistent) next to the app name in Android Settings &gt; Developer options &gt; Process stats after changing that option.