/scripts/restorepkg priority I/O

is there any way to increase priority of /scripts/restorepkg
command? I've a restoration process for a +35GB cpmove-user full backup that is taking +5 hours now, I check for the progress of restoration using du -s /home/[username]
as it stucked at 18% restoring homedir it is expanding by bytes, I think it may take +5 days to finish