Just to inform...
Using graphics.lua "stereo_mode_use_shared_parser" set to true, give me a boost in VR of 20% more performance, appart some screen border glitches. In addition, you have to set disabled "blur engines" options, so this engine blur is only is rendered in one eye.
Another positive point of this parameter, is that in VR no more cloud flickering are noticed.
Please devs, appart of VR optimization that sure you have planned, could we have some optimization just to improve VR a bit? like single pass rendering for example? thanks