Operating system: Windows 10
Graphics card: Nvidia mx230
Short description of error
Using autosmooth and custom normals at the same time is slow, even in situations where you wouldn't
expect normal calculation to happen (like moving an object in object mode).
Exact steps for others to reproduce the error
- Load the .blend file. Move the object around, it should be slow.
- Either disable autosmooth, or clear custom split normals.
- Moving the object should now be a lot faster