My 2 cents ... In Canada, being screened for a US departure, the laptop has to come out of the bag and is (usually) subject to a quick scan with some sort of swab that is then inserted into a machine which gives the ok. If unsure if they want to have it taken out, I ask. Simple.
As crew, I never hurry. If they want to go through all my stuff, I take my time and fold coat/jacket carefully before putting them in the tray for scanning, etc. Same thing at the other end. In the US when shoes have to be put on, I take my time and if it holds others up, too bad! I'm not looking like an idiot hopping around with shoelaces undone trying to get out of everybody's way. If they yell at me or otherwise upset me, I'm going for a leisurely coffee to regain my composure before going to the cockpit.
Another thing. If security are going to do a manual search of my belongings, they better have gloves on ... I insist on it. They don't like it, but tough. Who knows where their hands have been or what they have been handling just before I came along.
Fortunately, for most airport in Canada, Canadian crews can go through a special bypass where IDs are checked against a master list. Some will then scan all your stuff, and others will do a random search. A good system. Going through US Airports all the time would drive me nuts.