Constant CONFIGURE_BUDGET 

const CONFIGURE_BUDGET: Duration;

Rebuilds a canceled configuration until this much time is spent. A screen arriving or leaving cancels whatever is in flight, and that is the same moment a display’s mode and scale are being applied. Cancellations arrive in bursts, so the budget is a duration rather than a count of attempts: a count that outlasts a burst on one machine is spent inside one on a busier machine, where the attempts slow down and the burst does not. It can be generous because the caller is off the event loop with the GIL released, while giving up leaves the display on a capture-side scale until something asks again.