How One Team Pushed Klickspell's Mobile PageSpeed Score to 99 with Six Fixes

The team behind Klickspell identified six major performance bottlenecks after auditing their site with Google PageSpeed Insights and Chrome DevTools, finding their mobile score lagging despite a near-perfect desktop result. The largest issue was 49 MB of uncompressed PNG and JPG images, which were batch-converted to WebP format at quality 82, cutting total image weight down to 3.33 MB. Render-blocking CSS was eliminated by configuring Astro to inline all stylesheets directly into the HTML, removing the 606ms external request delay caused by GitHub Pages serving styles with a 10-minute cache lifetime. Additional fixes targeted forced layout reflow from a JavaScript breakpoint handler, above-the-fold entrance animations delaying the largest contentful paint by 1,450ms, and external Google Fonts requests adding 67 KB of network overhead. The combined optimizations brought the site to a 98–99 mobile score with zero cumulative layout shift and zero total blocking time.