Developer shares 8 Astro optimizations that achieved perfect 100 mobile PageSpeed score

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A web developer building a client site on the Astro framework achieved a perfect score of 100 across all four Google PageSpeed Insights categories on mobile by applying a series of incremental performance improvements. Key fixes included self-hosting web fonts with font-display swap, inlining stylesheets to eliminate render-blocking network requests, and using proper srcset attributes with responsive images. The developer also added fetchpriority hints for the Largest Contentful Paint image and configured long-term cache headers for hashed build assets. Astro's Islands Architecture, which ships minimal JavaScript by default, provided a strong performance baseline before any manual optimizations were applied. The findings highlight that achieving top Lighthouse scores typically requires combining multiple small fixes rather than relying on any single change.

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