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Odd Eevee performance issue
Open, Needs Triage by DeveloperPublic

Description

System Information
Operating system: OSX 10.15.1
Graphics card: D 700

Blender Version
Broken: v2.80, v2.81 beta (07968604ab19)

Short description of error
Eevee performance drops drastically depending on order of materials on an object.

Exact steps for others to reproduce the error

  1. Open blend file
  2. Switch viewport to "Rendered"
  3. Notice performance is normal
  4. Select circle, and Select the material Material.006.
  5. Click the up arrow so that Material.006 comes before Material.001 in the list.
  6. Observe performance drops drastically

The geometry doesn't seem to matter. No errors in the terminal either. If I can help test in any other way, please let me know.

Details

Type
Bug

Event Timeline

I have tested the same scene on my MBP mid 2015, same OS.
With Intel Iris Pro forced - no issue
With Radeon R9 M370X forced - same issue happens

I can't reproduce this on Windows, everything runs smoothly.

System Information
Windows-10 64 Bits
GeForce GTX 1070 NVIDIA 431.70

Blender Version
2.81 (sub 15), branch: master, commit date: 2019-10-21 18:07, hash: rB388c954cb537

Cannot reproduce.

Windows 10, GTX 1080, Nvidia 441.12 drivers
Blender 2.8 (rBf6cb5f54494e) and Blender 2.81 (rB8ab6ef30ab28)