Prevent Layout Shift from Images, Fonts and Dynamic Content
Prevent layout shift by reserving space and controlling when content changes the page geometry. The most frustrating movement often happens just as someone...
Reading path · 5 guides
Website performance & Core Web Vitals
Find the causes of slow content, delayed interactions and layout movement before choosing a performance fix.
Performance improvement works best when it starts with a specific page and a reproducible user experience. The guides below cover content loading, interaction responsiveness, stable layouts, and the cost of external scripts.
Use measurements to decide what to repair first, then retest the actual business journey. Local diagnostics explain likely causes; available real-user evidence helps establish whether the deployed change benefits visitors.
Recommended order
Start here.
Build the foundation, then explore the specific issue you need to solve.
012 min read
Core Web Vitals Optimization: Prioritize LCP, INP and CLS by User Impact
Prioritize Core Web Vitals work by identifying which user experience is slow or unstable and which pages affect the business most. A single lab score does...
022 min read
LCP Image Optimization in Next.js: Find the Actual Bottleneck
Optimize the image that actually drives Largest Contentful Paint on the affected page. Compressing every asset is not always the fastest route to...
032 min read
Debug Slow React Interactions and Improve INP
Debug slow React interactions by following one user action through event handling, rendering, and paint. An interface can load quickly yet respond poorly...
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