Bundle Size Analysis
Analyze and reduce your application's JavaScript bundle size for faster initial page loads and better performance.
What is a JavaScript Bundle?
When you build a Next.js application for production, all your JavaScript code – your components, libraries, and Next.js itself – gets combined and optimized into one or more files called "bundles".
These bundles are what the user's browser downloads to run your application.
Impact on Performance
The larger your JavaScript bundles are, the longer it takes for a user's browser to download, parse, and execute them.
- Slower Load Times: Users wait longer for your app to become interactive.
- Higher Data Usage: Especially important for mobile users on limited data plans.
- Worse User Experience: Can lead to frustration and users abandoning your site.