>>33253636 (OP)That's not the correct question
The correct question is how are you going to do it?
Rope? actually very painful, don't do that
Overdose on painkillers? stupidest suicide method, you will end up in a hospital with liver failure
Cutting yourself? I doubt you know how to do it correctly
Gun? do you even own one? if you do make sure to aim correctly
Jumping off a roof? There's a possibility that you won't die and instead will be in agonizing pain, even if you do it it's still a very painful suicide method
Choking on a bag? Nah, you will get frightened, horrible suicide method
Drowning? Same as above
Carbon monoxide or other inert gases? Only painless if you do it slowly, might actually be the best suicide method but requires skill and equipment
Lethal injection? If you are going that route I recommend potassium chloride injections, very painless and very fast.