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.

React Compiler promises to eliminate manual useMemo and useCallback calls. Here is a practical, step-by-step look at how it works and how to adopt it safely.

I'm often asked whether to use CSS or a library like Framer Motion for React animations. Here's the 3-step decision process I use to guarantee a smooth 60fps.

I've seen React apps grind to a halt during heavy computations. The problem isn't React, it's the single-threaded nature of JavaScript. Here's how we use Web Workers to fix it.

I profiled a React app that felt sluggish despite simple component logic. The problem wasn't the code we wrote, but the massive third-party libraries we imported. Here's how to diagnose and fix it.

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.

Rendering large lists in React can seriously kill performance. Here is a troubleshooting guide based on which library to use for which specific problem.

Dependency array issues are responsible for a large share of the React bugs I get asked to debug. Here is what causes them under the hood and how to fix each variant.

useTransition is often reached for as a generic performance fix, but it solves a narrow, specific

React.memo is truly helpful but frequently misapplied. Here is the practical decision framework I use after profiling dozens of components.