Slow after generating GCode

Hey all,
trying to do some 3D printing but I am noticing even simple 3D prints are slowing down my whole machine. I am on the most recent version of Luban. Loading in an STL file is fine and I choose normal print with supports but after that it takes longer and longer as percentage goes up to generate Gcode and then eventually (after maybe 30 minutes) generates a preview. Turning that off speeds it up a bit but sending it to workspace slows it back down till it’s unusable. Suggestions welcome.

How old is your computer and associated hardware? CPU, RAM, and graphics card capabilities play a big role in 3D model rendering.