Within ARMA Reforger, building is agonizingly slow!
Building is so slow, rarely are any of the barricades built or utilized ever.
Although there likely should be some delay or hindrance when building (eg. requiring supplies), preventing everybody from building at the same time, the long delays between starting building and completion of building are really ridiculous. Many times I find myself thinking, if I'm going to sit and waste 30-60 seconds building each object, I could find something far more useful to do with my time than play the game.