[systemd-devel] Why systemd-nspawn is slower than docker, podman and qemu?! how to Improve nspawn performance?

[Greg KH]

On Mon, Jan 25, 2021 at 11:56:09AM +0100, Badr Elmers wrote:
> Hi,
> Why nspawn is slow compared to docker podman and even qemu?!
> CPU tasks take twice of the time it takes in docker, podman or qemu
> 
> here I filled a request to improve nspawn performance which contain the
> steps and the full test result:
> https://github.com/systemd/systemd/issues/18370
> 
> Do you know why systemd-nspawn is slower? how can I improve it?

As I pointed out in the above "issue", the benchmark isn't measuring
what anyone thinks it is measuring and should not be treated as a
reliable indication of anything.

thanks,

greg k-h