AI blogs

React applications tend to feel fast when they're small. A handful of components, a few API calls, everything snappy. Then the application grows — more features, more state, more dependencies, more data — and what was once smooth starts feeling sluggish. This isn't necessarily a React problem. It's usually a product of specific, identifiable decisions that compound over time: components re-rendering more than they need to, JavaScript bundles that have grown without anyone auditing them, images served at full resolution regardless of the device requesting them, API calls that fire redundantly on every interaction. Each of these is fixable, but only if you know which one is actually causing the problem you're experiencing. That's the central principle behind React app performance optimization: measure first, optimize second. This guide covers the main categories of performance issues, how to measure them, and practical techniques for addressing them — along with gui...