If you’re building a small single-page application (SPA) in 2024, you’re choosing between a 2.3MB React 19 bundle and a 3.4KB Preact 11 payload — a 676x size difference that cuts first-contentful-paint (FCP) by 82% for low-end mobile users. Here’s how to pick the right one. 📡 Hacker News Top Stories Right Now Async Rust never left the MVP state (195 points) Should I Run Plain Docker Compose in Production in 2026? (66 points) Bun is being ported from Zig to Rust (555 points) Empty Screenings – Finds AMC movie screenings with few or no tickets sold (171 points) When everyone has AI and the company still learns nothing (25 points) Key Insights React 19’s new Server Components add 187KB to baseline bundle size vs Preact 11’s 3.4KB core (benchmark: WebPageTest, Moto G4, 3G Slow) Preact 11’s compatibility layer adds 12% overhead to React 19-equivalent code paths (benchmark: 10k mount/unmount cycles, Node 22, 4 vCPUs) Small SPAs (under 5 routes) see 92% lower CI build costs with Preact 11 (average $0.03 per build…