I start out with Hg then move to Git because Hg felt too slow for my need at the time. Ironically, Google & Facebook choose Hg over Git because they can make H

I start out with Hg then move to Git because Hg felt too slow for my need at the time. Ironically, Google & Facebook choose Hg over Git because they can make Hg run much faster than Git at their scale: While both vanilla Git and Hg are too slow for their huge monorepo, they basically replaced most of the core of Hg with their own implementation to speed it up for internal use, keeping only the Hg cli.