OS: Arch Linux 64-bit
Graphics Card: NVIDIA GeForce GTX 760
Broken: Latest build from builder.blender.org, hash: f0d15a6, gooseberry branch
Worked: Not tested
Short description of error
Using the new object picking feature, the performance is bad on high density meshes.
Exact steps for others to reproduce the error
In the attached .blend file, use the object picker and move the cursor over Cube.001. It starts to lag behind.