When entering play mode the editor uses an extreme amounts of resources for a few seconds. After that performance returns to normal.
Steps to reproduce:
- Create an empty Unity Project with version 2020.1.0b6
- Import Sirenix 2.1.12 through the Package Manager
- Open the Profiler
- Select “Editor” in the “Playmode” dropdown
- Enter play mode
- Observe that the editor uses a lot of resources and that the menu item text in the editor flickers
Attached is the project, but I think it should be reproducable with the above steps.
Edit1: Operating System: Windows 10
Edit2: Also if the Enter Play Mode Options (Experimental) in the Project Settings/Editor is enabled and the “Reload Domain” and “Reload Scene” are disabled this issue is not observable