Making Facebook 2x Faster

This post details Facebook's initiative to make the site twice as fast by focusing on reducing network and render times. It introduces key performance metrics like Time-to-Interact (TTI) and outlines strategies implemented, including reducing cookie, HTML, and CSS bytes through reusable components (built on XHP), and drastically cutting JavaScript bytes with the Primer library. It also introduces the BigPipe system for pipelining content generation and rendering, which successfully achieved the goal of doubling site speed.