How to get quick result for top 10 largest directories

I have a directory(mount point) of size 9T, and I would like to get each directory size, especially the once which has consumed more space. For this I am using below command and pushing result into a txt file from bash script. du -hsx * | sort -rh | head -10 Which is taking more time than i expected, Even after several hours i am not able to get the result in multiple occasion. I am trying this over a network and using mobgar VPN connection. Anything that can be improved here !