A torsion spring replacement on a standard double door is usually the fastest emergency call we run - once a tech is on site with the right spring size, it's under an hour of actual work. Cable and roller jobs run similar, since they're often found together on doors from the 1980s-90s stock that make up most of this area. Opener failures take longer to diagnose than to fix, because the symptom (door won't move) can be the opener, the wall switch, the safety sensors, or the door itself binding on a bent track, and we have to rule those out in order.
What we can't shorten is parts availability. If a torsion spring, cable drum, or opener logic board isn't a stock size we carry on the truck, that becomes a return trip, not a same-visit fix. We're upfront about that on the phone rather than promising a one-trip job we can't back up.