Dear All, I have a problem with Unity Editor with my 3D project. So basically is very slow when Scene window is open, Hierarchy lagging, the scene window almost can't move etc. I m having a large map with thousands of objects which you would say it makes sense to lag the whole editor but I have some argument here. My main PC is a Ryzen 1700x (8 cores/16 threads) with 16 gigs of fast ram and Nvidia 1070 and a m.2 SSD drive (around 3000 read/write speed). My Laptop is a 3-4 years old laptop with a 3rd generation Intel, 16gigs of ram and a crappy GTX 750m. both Unity 5.6.2f1 Now the same project lags hard on laptop and PC (in the editor), but it's fine in Play Mode (more FPS on the PC of course). The weird part is that when I check the resources of my PC (CPU/RAM/GPU), when in the editor and trying to edit my project, it hardly uses more than 10% of CPU, and 50% of RAM and GPU is running chilled. So I can't really understand why I have almost the same hard time editing my project on my main PC as my Laptop? What I did: Updated all drivers, everything Tried some -opengl and -nosinglethread etc. (doesn't really work, my project is dx11) Wiped everything reinstalled What it works, of course, is when I disable most of my map's objects, but that is counter productive and again, it doesn't make sense to lag when Unity doesn't utilize even the 1/3 of my system's power. Any thoughts? tl;dr: How can I make unity use my PC's power and not being so slow when in edit mode.