Core Web Vitals

The most common LCP advice targets the wrong root cause. Here is a practical comparison of beginner-level fixes versus advanced techniques that measurably move Core Web Vitals.

Third-party scripts are a common cause of poor Core Web Vitals. This post ranks five lazy-loading techniques by their practical impact on page speed.

By the end of this post you'll be able to define, enforce, and debug a performance budget for a React app — including the specific tools that catch violations before they ship.

Cumulative Layout Shift is measurable, fixable, and often caused by a small set of recurring patterns. Here are the five worst offenders, ranked by how much shift they typically cause.

Chrome's own data shows most slow interactions aren't caused by the work you'd expect. Here are the five most common INP culprits in React apps, ranked by how much they typically cost you.

Lighthouse scores get chased, misread, and dismissed in equal measure. Here's what the audit actually measures and how to use it correctly on a React app.

By the end of this guide, you'll be able to diagnose whether your rendering strategy is causing a specific performance problem and apply the correct fix instead of guessing.

Lighthouse scores and real-user Core Web Vitals often disagree, sometimes by a wide margin. Here's what the data shows about measuring performance correctly in React.

I was asked to diagnose a React app failing its Core Web Vitals. The culprit was image handling. Here is the step-by-step process we followed to fix it.