Steps to repro:
1. Open attached project "Performance Issue.zip"
2. Make sure you are in Level_1 scene (Assets/Levels/1 world/Level_1.unity)
3. Open Arrow prefab in Prefab Mode
4. Detach GameView to a separate window
5. Enter Play Mode
6. Try expanding, collapsing RigidBody 2D on an Arrow prefab and compare the performance

Reproduced in: 2019.3.0b4, 2020.1.0a5

Note:
1. Profiling Editor shows a spike in GUI.TextureDraw.
2. Profiling Playmode shows a spike in RenderTexture.SetActive.
3. 2019.3 performance is way worse than 2020.1.
4. Could not reproduce on earlier versions due too package errors