對於developer 來講，coffee 係你既好朋友~
A lethal dose of caffeine is thought to be roughly 10 grams — about the mass of your standard #2 pencil. That converts to a whopping (but basically undrinkable) 4.69 gallons of coffee, or 120 standard cans of Red Bull. Still, 2012 saw several deaths linked to energy drinks in the United States — five were attributed to Monster Energy drinks and thirteen to 5-hour Energy shots. These came on top of a massive spike in energy-drink associated ER visits. Caffeine’s harmful or unwanted effects can be triggered at much lower doses than what is considered “toxic.” So how much caffeine is too much?