#Debug Navigation performance Issues

21 messages · Page 1 of 1 (latest)

lavish crag
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Navigating to pages with the nuxtlink component takes ages. Sometime up to 3s. How can I debug this?

swift rapidsBOT
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Hi @lavish crag. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:

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To debug slow navigation performance with the <NuxtLink> component in Nuxt, you can use several built-in tools and best practices:

  1. Nuxt DevTools
    Use Nuxt DevTools to gain insights into your app's performance. The Timeline feature tracks time spent on rendering, updating, and initializing components, helping you identify bottlenecks during navigation. The Render Tree and Inspect features can also help you see which components and files are loaded and their impact on performance Nuxt DevTools.

  2. Chrome DevTools
    Open the Performance tab in Chrome DevTools to record and analyze navigation events. This will show you metrics like Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), and Interaction to Next Paint (INP), which are crucial for understanding navigation delays Chrome DevTools.

  3. browserDevtoolsTiming Experimental Feature
    Enable the browserDevtoolsTiming experimental feature in your nuxt.config.ts to add performance markers for Nuxt hooks in the browser devtools. This helps you track exactly where time is spent during navigation in the Performance panel of Chromium-based browsers:

    export default defineNuxtConfig({
  experimental: {
    browserDevtoolsTiming: true,
  },
})

    This is enabled by default in development mode browserDevtoolsTiming.

  4. NuxtLink Prefetching
    By default, <NuxtLink> uses smart prefetching, which can sometimes cause delays if too much is prefetched. You can change the prefetching strategy to only prefetch on interaction:

# 
   export default defineNuxtConfig({
     experimental: {
       defaults: {
         nuxtLink: {
           prefetchOn: 'interaction',
         },
       },
     },
   })

This can help reduce unnecessary network requests and speed up navigation Links.

  1. Nuxi Analyze
    Use the nuxi analyze command to visualize your production bundle. Large blocks in the visualization may indicate components or libraries that are slowing down navigation. Consider lazy loading or splitting large components Nuxi Analyze.

  2. Check for Lazy Loading and Hydration
    Use lazy loading (Lazy prefix) and lazy hydration (hydrate-on-visible) for components that are not immediately needed. This reduces the initial JavaScript bundle size and can improve navigation speed Lazy Loading Components, Lazy Hydration.

By combining these tools and strategies, you can pinpoint and address the causes of slow navigation in your Nuxt app. If you still experience issues, use the Timeline and Performance panels to identify specific components or network requests that are causing delays.

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:

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@lavish crag Kapa.ai is still learning and improving, please let me know how I did by reacting below.

frail bramble
lavish crag
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Hi, yes it does

frail bramble
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Tldr it's probably the issue

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Already did long messages days and weeks agos, never had any official response

lavish crag
frail bramble
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Not even an issue

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It's misunderstandings of nuxt team at this point 🙁

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I wont harass people about open source stuff so, I just gave up the fact that it will never ba clarified

lavish crag
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Okey but that's a bad design 😅 If no one should use await, why is it allowed to use

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I think that's feedback from the community that is important and makes the framework better

frail bramble
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There are lazy which half fix that

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Si you add a option to bypass a keyword which is not required this_is_fine_anim

frail bramble
lavish crag
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Dang, i had an await in a catch all route, I removed it and the site feels snappy now 😅