Practical guide to the <img> element: from basics to LCP
Image markup tweaks that boost Core Web Vitals.
Performance news
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Practical guide to the
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Stop turning everything into arrays
Lazy iterator helpers cut allocations and stop work early in UI data pipelines.
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Bundle size investigation. A step-by-step guide to shrinking your JavaScript
A checklist for hunting megabytes, and shipping less JS.
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Debugging web performance with Chrome DevTools
A practical checklist for spotting bottlenecks and validating fixes in real time.
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Fixing the URL params performance penalty
New HTTP header boosts caching by ignoring tracking params.
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Speeding up CSS with compression dictionaries
Using shared compression dictionaries to cut CSS load times and bandwidth across pages.
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Performance monitoring for web components
Using the User Timing API to track real-world component performance
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Evaluating frameworks performance
Comparing 10 meta-frameworks: Marko, SolidStart, SvelteKit, Qwik lead. React has limits.
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React Compiler v1.0
Stable compiler auto-optimizes components, improves speeds up to 12%, used in Meta apps.