““If you’d really kept doubling your mass daily until birth, then you’d have expanded quite slowly initially (by just a few cell sizes per day). But toward the end of your gestation period when you weighed more than our observable Universe and doubled daily, you’d have expanded with a mind-bogglingly large speed of many billion light-years per day. Whereas you used to double your mass once per day, our inflating baby Universe doubled its mass extremely often—in some of the most popular versions of inflation, one mass doubling occurred about every ten trillionths of a trillionth of a quadrillionth (10−38) of a second, and about 260 mass doublings were required to create all the mass in our observable Universe. This means that the whole inflation process, from beginning to end, could have been almost instantaneous by human standards, requiring less than about 10−35 seconds, less time than light takes to travel a trillionth of the size of a proton.””
