Performance in Vue 3
Optimizing performance ensures fast load times and smooth user experiences. Vue 3 provides several tools and patterns for building high-performance apps.
Code Splitting & Lazy Loading
- Use dynamic imports to split code and load components on demand:
const UserProfile = defineAsyncComponent(() => import('@/components/UserProfile.vue')) - Lazy load routes in Vue Router:
{ path: '/profile', component: () => import('@/views/ProfileView.vue') }
Asset Optimization
- Compress images and use modern formats (WebP, AVIF).
- Minify CSS and JavaScript during build.
- Use SVGs for icons and simple graphics.
Caching
- Set cache headers for static assets.
- Use service workers for offline support (via PWA plugins).
Profiling & Monitoring
- Use Vue Devtools for component performance profiling.
- Monitor bundle size with Vite's build analysis tools.
- Track runtime performance with browser devtools and Lighthouse.
Best Practices
- Avoid unnecessary reactivity and deep watchers.
- Debounce or throttle expensive operations (e.g., API calls, input events).
- Memoize computed properties when possible.