in the comments for 5869 I saw: “Allow OpenGL plugins to specify priority for the present thread. Use time critical priority for Oculus.”
If for Windows OS by time critical you mean using the REALTIME_PRIORITY_CLASS (or THREAD_PRIORITY_TIME_CRIT) for long running code, that will cause all manner of problems. The audio compositors could get delayed, or the scheduling of mouse movement, inter-thread events can get delayed.
HIGH_PRIORITY_CLASS (or THREAD_PRIORITY_HIGHEST) is the one to use.