Most performant way to "take over screen" from MacOS

Related to my previous topic about SPICE, I was thinking: what is the most performant way to remote-controll a desktop on a VM? I find VNC a bit underperforming. I'm not sure if that's macOS related though. I want to take over the screen of Ubuntu desktop, which runs as a VM. What is the best and most performant way to achieve this from a mac nowadays?
 
X2GO is a good way, yet it has its own display and is not using the virtual display card in your VM. It is fine for "working", but anything besides that will probably not work (e.g. video, audio and playing games).