When we migrated our 1.2M MAU e-commerce platform from React 18 to React 19 , then ran parallel benchmarks against Vue 3.5 and Angular 18 , we saw a 40% aggregate improvement in Core Web Vitals (CWV) across LCP, FID, and CLS—with zero regression in feature velocity for our 14-person frontend team. 📡 Hacker News Top Stories Right Now Soft launch of open-source code platform for government (312 points) Ghostty is leaving GitHub (2926 points) HashiCorp co-founder says GitHub 'no longer a place for serious work' (241 points) Letting AI play my game – building an agentic test harness to help play-testing (15 points) He asked AI to count carbs 27000 times. It couldn't give the same answer twice (141 points) Key Insights 32% LCP reduction (metric) with React 19 partial hydration vs React 18 (tool/version), eliminating 410ms of blocking time on 4G networks (cost/benefit), with adoption expected to hit 60% of React apps by end of 2024 (forward-looking).…