On Mon, Jul 31, 2017 at 06:52:28PM +0800, lampahome wrote:
> if I mount through guestfs library in python or guestfish, the same
> condition happenes?
>
> I mean the insane number of layers and the performance

No.  The layers are only present because guestmount uses FUSE.

libguestfs itself performs very well if you are careful to use it in
the correct way.