This question implies death is the worst that could happen to you.
Personally, I don't see it that way. There's a lot more hurtful things than death.
Death is one occurrence, with no pain in the death itself, and "only" secondary pain in those left behind.
There's a lot more hurtful and lasting pain you can inflict, physically and psychologically, and without a definite endpoint.
If it takes only two minutes, do it right away.