Generator window causes my editor to lag every couple seconds

[niuage]

When I have a generator window opened my Unity editor lags for a bit less than half a second every few seconds. Based on the profile I think it's because of CGGraph.Paint, but not 100% sure. I feel like it's even worse when interacting with the generator window, even just panning, not making any changes.

Any idea how I could improve the perfs in the editor? Curvy Spline is not generating the meshes periodically in the editor, when making no changes, is it? I read the perf tips page but didn't find anything that could explain these lags in the editor.

Thanks for your help.