TLDR; using lowercase in markup improves the compression as the dictionary for the algorithm will be smaller. Most HTML/JS/CSS is case insensitive and can be optimized as lowercase. micro-optimizations can be fun… or an utter pain. I’ve been on both sides of this debate at times, at one time had sub-second SLA’s for a web … Continue reading Use of lower-case HTML5 DOCTYPE as a network micro-optimization
