Depends on the move speed of the hero you're playing at the moment. Although slow, Roadhog can charge for quite a while any unobstructed distance, which in your case is from between A-B (The middle of the open space) up to B. Moreover its not your job to rush and be the first on the point in this case, 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.