System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 2060 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 471.11

Blender Version
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-08-12 19:12, hash: rB1275ce61b1b0
Worked: (newest version of Blender that worked as expected)

Short description of error

1. in material preview mode add material to a 2000 poly obj
2. enter edit mode try to move verts/ faces just mess around, you'll notice random freezes in viewport or even when you open blender preferences whole blender lags
3. you can experiment with the attached file on the wooden beam, but you have to be in material preview or eevee render preview, the problem is with eevee i think

Exact steps for others to reproduce the error
[Please describe the exact steps needed to reproduce the issue]
[Based on the default startup or an attached .blend file (as simple as possible)]