IT’S NO LONGER enough to build lean companies quickly. The companies of the near future will need to be both fast and massive. And if it takes years to grow from a small startup to a major player in Silicon Valley, well. That’s just too slow. LinkedIn co-founder Reid Hoffman says Silicon Valley now demands that companies double their size after three months, then six months, then a year. He calls it “blitzscaling,” and today at the four-day WIRED25 festival in San Francisco, he explained the basic concepts to his good friend and intellectual sounding board Joi Ito, the iconoclastic director of MIT’s Media Lab.