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

[Mantas Mikulėnas]

On Mon, Jan 25, 2021, 12:56 Badr Elmers <badrelmers at gmail.com> 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?
>
> thank you
>
>
>
Have you tried completely *disabling* the syscall filtering and all other
seccomp-based features? Export SYSTEMD_SECCOMP=0 before running nspawn and
check if it makes any difference...
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