@halirutan For example to hide FrontEnd` begining or to shorten Dynamic obj updating message:
System`EvaluatePacket[FrontEnd`SynchronousDynamicEvaluate[Refresh[TimeConstrained[ToBoxes[Global`x, StandardForm], 6.0], RuleDelayed[TrackedSymbols, All], RuleDelayed[UpdateInterval, 1]], 158289, 9.0, 6.3154120445251465]]
etc.
It is not very important, I'm just curious.