You may experience long UI stalls or poor performance with the Unity editor when targeting Oculus Rift on Windows 10.
Workaround: Run Windows update to ensure that you have the latest version of Windows 10.
The combination of all Unity versions with Oculus runtime 1.17 and higher and Windows 10 + Creators Update results in spurious WM_DEVICECHANGE reports in the editor, even in non-VR projects. You may not notice any impact, but if you're connected to certain USB devices, you may find the Unity editor becomes non-responsive and you needs to terminate it from Task Manager.
Workaround: Update to the Beta runtime available on our Public Test channel. We are currently working with Unity and Microsoft on a permanent solution.