Next js build collecting page data taking too long
Best practices to increase the speed for Next.js apps
[Ed. note: While we take some time to rest up over the holidays and prepare for next year, we are re-publishing our foremost ten posts for the year. Please enjoy our favorite perform this year and we’ll notice you in 2023.]
In recent years, web application development has undergone a radical transformation due to the rise of Next.js. It simplifies the process of creating hybrid applications with client-side as well as server-side rendered pages. While the framework is easy, developers still struggle to multiply the speed of their applications.
An application’s speed is strongly comparable to the amount of period it takes to serve the application code, styles, and facts to the client in the first round trip. When the server needs to send additional assets (for example images) during the initial round trip, the application performance degrades. Fortunately, developers can follow a number of best practices to improve the speed of their Next.js applications.
Server-side rendering (SSR) is a approach used to render the initial HTML of a webpage on the server before delivering it to the browser. Using server-side rendering will help your a
Issue with building next.js app. Build logs included. Im pretty stuck here and need some help
This is my current build log. I have spent time removing unnecessary pages that were causing the first document not defined issues. Now that those are removed I get only one error as you can see below. Also added the CI= npm run build, but its still not building. Not sure what to do here and could really use some help.
7:16:26 PM: Waiting for other deploys from your team to complete. Check the queue: Netlify
7:17:27 PM: build-image version: 006dca901dab83234b4881f914ac1a189ff41daa (focal)
7:17:27 PM: buildbot version: e8a1f877a96ee9d2b754bae26acb6bb322cba939
7:17:27 PM: Fetching cached dependencies
7:17:27 PM: Failed to fetch cache, continuing with build
7:17:27 PM: Starting to prepare the repo for build
7:17:27 PM: No cached dependencies found. Cloning fresh repo
7:17:27 PM: git clone --filter=blob:none https://github.com/username
7:17:28 PM: Preparing Git Reference refs/heads/main
7:17:29 PM: Custom build path detected. Proceeding with the specified path: ‘’
7:17:30 PM: Starting to install dependencies
7:17:30 PM: Python version set to 3.8
7:17:30 PM: Attempting Ruby
Telemetry
Next.js collects completely anonymous telemetry data about general usage. Participation in this anonymous program is optional, and you may opt-out if you'd not like to share any information.
Why is telemetry collected?
Next.js has grown considerably since its release, becoming the de-facto React Framework for developers. Prior to telemetry collection, making decisions about how to improve Next.js was a very manual process.
For example, Vercel dogfoods many large React applications (including the Next.js website). Additionally, we actively engage with the community to gather feedback.
However, this approach only allows us to collect feedback from a subset of users. This subset may have different needs and use cases than you. Telemetry allows us to accurately gauge Next.js feature usage, pain points, and customization.
This data will let us better tailor Next.js to the masses, ensuring its continued growth, relevance, and best-in-class developer experience. Furthermore, this will allow us to verify if improvements made to the framework are improving the baseline of all applications.
What is being collected?
We track general usage information, such as Next.
Guide to fast websites with Next.js: Tips for maximizing server speeds and minimizing client burden
Tinloof Co-founder Seif Ghezala gives insights into how his team measures website speed with best practices to make faster websites.
Tinloof is an agency obsessed with delivering fast websites such as jewelry brand Jennifer Fisher, which went from a Shopify theme to a modern Next.js
When evaluating the speed of a website, they look at key metrics in a typical user journey:
Server response time: How long it takes for the user to get any feedback once landed on the page.
Page render time: How long it takes for a page to become fully visible and interactive.
User interaction time: How long it takes the user to make key interactions on the page such as navigating between pages or adding an item to the cart.
This article covers tips to measure and make each part of the user journey as fast as it gets.
Link to headingThe basics of site speed: Measuring data correctly
The key to making your site fast and keeping it fast—for any user on any device—is data.
Speed is more than just a way to gauge user experience, it's crucial for getting the top spot on any s
Prerender Error with Next.js
Why This Error Occurred
While prerendering a page during , an error occurred. This can happen for various reasons, including:
- Incorrect file structure or non-page files in the directory
- Expecting props to be populated which are not available during prerendering
- Using browser-only APIs in components without proper checks
- Incorrect configuration in or
Possible Ways to Fix It
1. Ensure correct file structure and use App Router for colocation
Pages Router
In the Pages Router, only special files are allowed to generate pages. You cannot colocate other files (e.g., components, styles) within the directory.
Correct structure:
App Router (Next.js 13+)
The App Router allows colocation of pages and other files in the same folder. This provides a more intuitive project structure.
Example folder structure:
2. Handle undefined props and missing data
Pages Router
For the Pages Router, use conditional checks and return appropriate props or a 404 page:
3. Handle fallback in dynamic routes
If you're using or in , ensure your page component can handle the loading state:
If you're using or in your , ensure that none of your pages use .