gdbus call_in_idle_cb has higher priority than frame clock dispatch, stalls the main loop
While investigating Tracy profiles, I noticed that occasionally a number of small GSource dispatches stall the frame clock dispatch on the main loop. It seems that some of those dispatches are gdbus-related, with a priority of 0, which is higher priority than the frame clock clock dispatch at 150. Here's an example of them stalling the frame clock dispatch for several milliseconds:
I'm not sure if gdbus should have its priority lowered somehow, or if frame clock dispatch should get a higher priority.