Delays when saving a scene, selecting objects, duplicating objects, dragging objects into the scene and similar tasks are barely noticeable with a small project, but with a project with 6 GB of assets, the editor seems to hang for about 2 seconds for each of those tasks, even when the scene is empty.
I’ve also noticed that models dragged into the scene don’t appear until the cursor moves for at least a pixel. It then takes another 2 seconds for it to appear in the hierarchy.
The attached screenshot shows a profiler spike when an object is dropped in the scene (aside from those hangs, the editor runs extremely fast, so it was quite difficult to catch).