[gentoo-user] Record sizes of directories of a directory tree (huge) most efficiently

[Meino . Cramer]

Hi,

I want to determine the size of the contents of all directories of a
tree of directories on a hexacore AMD64 machine with 4GB RAM an one
harddisk (containing that tree) -- most efficiently (least time
consuming).

I tried this (cwd = root of that tree):

    find . -depth -type d -print0 | xargs -0 -P 6 du -bsx {} \;

. Is there any to do this faster?

Thank you very much in advance for any help!
Best regards,
Meino