High Performance Web Fonts
summary
Demo shows a concrete tool called subfont that pulls Google Fonts local, preloads them and applies font-display: swap, cutting the slow-path cost so first paint drops from about 7s to ~4s on a Moto/slow‑3G test. Claims 80–90% of that gain comes from hosting fonts locally; transcript shows static-analysis via AssetGraph and a novel subset-on-demand hybrid to serve tiny subsets then fetch full fonts for missed glyphs. Works for static sites only.
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