I am getting big spikes in Physics.Processing in 2018.0 Beta 6, this is not happening in the same project in 2017.3 and earlier. Physics.Processing goes from the normal value of around 0.6ms to 94ms every second or so, I have no idea what is causing it, there is very little going on in the scene. I have attached two grabs of the profiler one showing the normal frame and one the spike frame. What is causing this and is there anything I can do to stop it?
Could you please submit a bug report with a minimal reproduction project and reply in here with the case #? You can find more information about bug reporting here.