I would like to thank you again for your time and confirming my initial thoughts on SSR and VR.
Problem is without it the objects do not look “grounded” and reflections are literally all over the place.
I do understand however that all these reflections need to be calculated twice in VR and comes at a significant cost.
One final question perhaps: Is there a way to see/profile the actual gpu load/time BEFORE vsync is applied (assuming vsync is what is causing the 22ms set point) ? I do not believe it is possible to disable vsync anymore through console.
Note: I was using the Sun Temple demo as a reference. Has grounded reflections and solid 90fps in VR. Post Processing volume there has SSR unchecked but NOT set to 0 so I guess it is still ON. Big caveat in Sun Temple in MISC settings PostProcessing. Screen Percentage is set to 100 … that is probably the biggest FPS gain in UE4.