Build for production
Run your Astro production build and deploy its output using the hosting approach required by your EmDash project. Astro optimizes bundled assets during build. Measure the deployed pages instead of assuming that minification alone makes them fast.
Focus on the biggest costs
Resize and compress images, reserve their display dimensions, limit client-side JavaScript and avoid unnecessary third-party scripts. Check representative content pages on mobile with Lighthouse or PageSpeed Insights after each significant change.