putting # in front of some specific sensor lines almost in the end of the file.

But have already restored it.
Now i'm trying to disabled some sensors in /etc/sensorsfw/primaryuse.conf
disabled accelerometer, magnetometeradaptor, gyroscopeadaptor, orientationadaptor

proximity and alsadpter are still working
huge improvement in cpu usage

i always restart the phone to be sure that every service is fully restarting

I believe that the orientationadapter is the main reason for the big cpu usage, and after a while also a bigger memory usage