>>9357157there is no 'fastest way' to kill yourself as all suicide methods require you to have an enormous amount of willpower (or desperation) to effectively carry on
a gun is probably the tool that would allow you to die the easiest way possible, a rather painless one would be carbon dioxide poisoning
hanging from a fairly high location in hopes to snap your neck is another clean, fast way to an hero
reconsider your choices if you are seeking genuine answers, there is always a chance for you to bounce back