In countless trips worldwide I have never spent more than 2 minutes in a security check. It adds no significant time to the trip whether at point of origin or midway at a connecting point.
Where hours and hours of my time, and in some cases connecting flights, have been lost is in queueing to get to the security check point in the first place. This is what hacks everyone off about security checks. It is not the actual check, it is the queueing for it because inadequate resouces are provided for it. And that contributes nothing to security at all. It is straight pennypinching and poor management, and nothing whatsoever to do with security.
Why are airport managements so couldn't-care-less about their secirity provision. The actual setups normally look like they were assembled yesterday, with temporary tables, cramped areas, and the electrics installed with odd wires running loosely down from the roof, and stuck together with duct tape. Go and look at the business class lounge and all the fittings are installed properly. Why the difference ? Security has been with us for 40 years.