I am currently spending some time looking at my games' performance and optimizing both cpu and gpu based areas.
One thing that is currently driving me crazy is this SlateUI item from the GPU profiler output.
I am testing this with a packaged/cooked version of my Unreal game. I am not using any slatey 2d ui things.
When I test the same build in 2d desktop mode I don't even get a SlateUI item in the list.
It seems to just happen when rendering to the Rift.
Here's an example output,
[2017.08.11-23.18.47:140]LogRHI: 38.1% 3.86ms SlateUI 1 draws 2 prims 4 verts
So since it seems to be VR only related I was hoping someone here know what causes this and how I can get rid of it.
It's way too many ms from the 11ms budget.