Depends on the move speed of the hero you're playing at the moment. With Roadhog your options are limited ... But in this case its not your job to rush and be the first on the point, surely you must have had more mobile units on your team who would have scaled the distance faster.
It takes 8 seconds to re spawn, 2 or 3 more seconds to run from spawn to the point and any distance you have between you and your suicide spot.
The only situation where suicide would be an OK strategy is you being on the furthest point way behind the A point where the enemy can flank. FROM there to B, the distance is greater than 10 seconds. From most other spots you can run + charge faster than 10 seconds.
Also it is worth pointing that you should really know when to run to A and when to prepare on B. I've been playing this game since release and only two days ago I got the achievement of not loosing A at all. A is pretty much always captured. If you see that there are no alive teammates and there are 3-4-5 people contesting, your HP and Damage will be far more valuable on the clutch point, instead of you running just to die immediately being jumped by 4 people.