Unless I want to go get food or coffee and the lines are long I never feel rushed with the 45 min show. When already at the airport I usually review the paperwork about 45-60 minuets prior to push while enjoying a cup of coffee, show up at the plane 30 prior to push, preflight, load the box, and still be ready to push 10-15 early. I don’t rush, but I dont waste time either. Also, as a f/o I don’t have to brief the flight attendants so that cuts down on my time requirements. Downloading the paperwork, review, preflight, load the box, and push is easily done within 30 minutes without rushing unless you’re new to the plane. If other guys want to start the process earlier and that is what works for them, I say stick with what you find works best for you.