Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: AMD Radeon VII ATI Technologies Inc. 4.5.13558 Core Profile Context 26.20.11015.5009
Broken: version: 2.81 (sub 12), branch: master, commit date: 2019-10-01 19:51, hash: rB3b23685c7dc1
Short description of error
Scenes with many objects have very bad performance / fps, compared to Blender 2.8!
My attached example scene is an Import from SketchUP and has around 1500 mesh objects and 250k faces. With regular 2.8 Version I get around 110fps in workbench and 33fps in eevee. With the newest 2.81 alpha build I get 53fps in workbench and 9fps!! in eevee!
Exact steps for others to reproduce the error
Open attached file and press play in workbench and eevee mode. Make sure, that overlays are on, to see the fps. And compare the file and fps with the regular 2.8 version