Learn how to set up Zstandard (zstd) HTTP compression on Nginx, Caddy, Node.js, and Cloudflare. Includes benchmarks against gzip and Brotli, plus how the right compression strategy improves TTFB, LCP, and Core Web Vitals.
Learn how to define performance budgets and enforce them with Lighthouse CI in GitHub Actions. Catch regressions automatically with budget.json config, lighthouserc.js setup, and real-world thresholds for e-commerce, blogs, and SaaS dashboards.
Learn how to measure, diagnose, and fix Time to First Byte (TTFB) with server-side caching, CDN edge strategies, compression, 103 Early Hints, and Server-Timing headers — with code examples for sub-50ms response times.
Learn how to optimize your site for the browser's back/forward cache (bfcache) to achieve instant back navigation, improve Core Web Vitals, and fix common blockers like unload events and Cache-Control headers.
Move heavy JavaScript off the main thread with web workers and watch your INP score drop. Practical examples with Comlink, Partytown, transferable objects, and SharedArrayBuffer — plus how to measure the real impact on Core Web Vitals.
Service workers give you programmatic control over browser caching, turning repeat visits into near-instant page loads. Learn the five core caching strategies, implement them with Workbox 7, and see how service worker caching stacks with HTTP caching to boost Core Web Vitals.
Learn how to implement the View Transitions API for smooth, GPU-accelerated page transitions in both SPAs and MPAs. Covers cross-document transitions, Speculation Rules integration, Core Web Vitals impact, and a full performance checklist.
Learn how the CSS content-visibility property can cut rendering time by up to 80%. Covers content-visibility: auto for deferred rendering, contain-intrinsic-size for preventing layout shifts, SPA view caching, and Chrome DevTools profiling to verify real gains.
A practical guide to browser resource hints — preload, preconnect, prefetch, dns-prefetch, fetchpriority, modulepreload, and HTTP 103 Early Hints. Learn when each hint delivers real gains, how to avoid mistakes that hurt loading speed, and how to audit your setup.
Learn how to fix render-blocking CSS using critical CSS extraction, the media print swap technique, and tools like Beasties. Covers automated extraction, unused CSS removal with PurgeCSS, and framework integration for Next.js, Nuxt, and Astro.
Get HTTP caching right with production-tested Cache-Control recipes for every asset type. Covers CDN strategies, stale-while-revalidate, ETag validation, cache busting, and 103 Early Hints.
Third-party scripts silently kill your site speed. Learn how to audit every external script, measure its real cost, and fix it — from simple async/defer changes to advanced techniques like Partytown web workers and server-side GTM tagging.
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