Operating system: macOS Mojave 10.14.2
Graphics card: Radeon Pro 560X 4096 MB
Intel UHD Graphics 630 1536 MB
2.80, 1b839e85e142, blender2.8, 2019-04-25
Download file is blender-2.80-1b839e85e142-OSX-10.9-x86_64
Short description of error
Undo takes a LOT of time on those tasks:
If I move an object and undo, resize and undo.
If I change something in a shader.
If I delete an object and undo.
When I undo a paint in Weight Paint, Vertex Paint and Texture Paint.
This doesn't happen on:
Sculpt Mode and Edit Mode.
Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).
Do some of those tasks to see how it slows down on specific actions.