Generating paths for "complex" projects

I just started a new project and it contains a lot of lines to create a grid texture. When i go to generate preview it takes a while to create preview and then even longer to create tool path preview. Then even after the path has been previewed it has to re-generate at the time of carving.

I use two different computers to work on my designs, main desktop with plenty of cpu/gpu power and then i use my mini-pc to do actual cuts. both seem to experience the lag. when i say lag i mean like 20mins or so.

Where does easel actually do the cut generation at, is it local computer, server, or??