We added Viz.DisplayCompositor.SurfaceEmbeddingTime to determine the impact of Surface Synchronization upon performance.

We noted that it is slower on Linux than other platforms.

We also noted that it is only 25% of the time of MPArch.RWH_TabSwitchPaintDuration.

It would be good to get a better subdivision of the tasks involved in tab switching. In order to see what other outliers might exist.

We have discussed adding new trace events, then running locally our on a clustered telemetry run.