Performance March 17, 2026 Cristhian Luna
Building Performant Astro Sites with Edge Rendering
How to squeeze every millisecond out of your Astro app using edge functions.
Why Edge Rendering Matters
Edge functions execute close to the user, cutting latency dramatically. Paired with Astro static output, you get the best of both worlds.
Key Techniques
- Use Cloudflare Workers for dynamic routes
- Leverage ISR for semi-static pages
- Cache aggressively with stale-while-revalidate
Measuring Results
Core Web Vitals should be your north star. Aim for LCP under 2.5s, CLS below 0.1, and INP under 200ms.