the 6.18 is lagging and having trouble displaying a small model (containing 1000 curves, 229 poly surf, and 400 surfaces) !! even on a shaded mode only, zooming and orbiting is quite throttling ! The image freezes a bit before continuing.
I made a screen recording available through this link (https://we.tl/t-MW8QWynGBW) , you can see how it looks like.
On an Arctic mode, it is really having trouble to even move the camera ( I tried under CPU and OPENGL modes using the 2 graphic cards //cycles).
I am running on a MacBook Pro i9 2.9 Ghz, 32 Gb 2400 MHz DDR4, Radeon Pro 560x 4 GB.