1. persist.sys.main_storage=external_sd (same as changing default storage location in setting)
2. persist.audio.vr.enable=true (improves sound a bit)
3. ro.qc.sdk.sensors.gestures=true (might be just me but better response when navigating on device)
4. ro.qc.sdk.camera.facialproc=true (no effect noticed so far in camera app)
5. presist.sys.animationstart=false (Small performance boost, no animations)

 

Could that be for facial recognition unlock of the device?

 

That's what I was thinking too, but when I began toggling it in the camera setting it did not change the value in build.prop.

 

ro.hwui.text_cache_width=4096 (Clears out the text faster when zooming in)