React Performance Anti-Patterns: 5 Mistakes That Kill Your App's Speed!
Is your React app dragging its feet, but you can’t pinpoint the cause?
You might think you’re following the best practices, but some common development patterns are actually degrading your app’s performance behind the scenes.
In this article, we’ll uncover 5 sneaky anti-patterns that are silently killing your React app’s speed, and show you how to fix them for a faster, smoother user experience.
So let’s get started.
1. Context Causing Mass Re-renders
The Problem: Adding everything in a single context.
The Solution: Split contexts by concern.
2. Inline Object/Array Creation in Props
The Problem: Passing inline objects/arrays as props to a component.
First Solution: Define constants outside the component.
Second Solution: Use useMemo for dynamic values.
3. Rendering Everything in a Huge List
The Problem: Displaying the entire list at once.
The Solution: Use React Window/React Virtualized library.
4. Not Memoizing Expensive Calculations
The Problem: Calculating values during rendering.
The Solution: Use the useMemo hook.
5. Anonymous Functions in JSX
The Problem: Creating new functions on every render.
The Solution: Use event delegation.
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