Docker has native compute performance. The processes essentially run on the host kernel with a different set of libs. The only notable overhead is in storing and loading those libs which takes a bit more disk and RAM. This will be true for any container solution and VMs. VMs have a lot of additional overhead. An a cursory glance, Incus seems to provide an interface to run Linux containers or VMs. I wouldn't expect performance differences between containers run through it compared to Docker.