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Google Lighthouse is an open-source, automated tool for measuring the quality of web pages. It can be run against any web page, public or, requiring authentication.
Google Lighthouse es una herramienta automatizada de código abierto para medir la calidad de las páginas web. Se puede ejecutar en cualquier página web, pública o que requiera autenticación.
- What Is Google Lighthouse?
- Google Lighthouse and Web CORE Vitals
- How Are Google Lighthouse Performance Metrics calculated?
- Google Lighthouse Performance Metrics Explained
- How to Test Performance Using Google Lighthouse
- How to Use Google Lighthouse to Run Tests
- What Is The Difference Between Google Lighthouse and Pagespeed Insights?
- Conclusion
Performance is about measuring how quickly a browser can assemble a webpage. Lighthouse uses a web browser called Chromiumto build pages and runs tests on the pages as they’re built. The tool is open-source (meaning it is maintained by the community and free to use). Each audit falls into one of five categories: 1. Performance. 2. Accessibility. 3....
On May 5, 2020, the Chromium project announceda set of three metrics with which the Google-backed open-source browser would measure performance. The metrics, known as Web Vitals, are part of a Google initiative designed to provide unified guidance for quality signals. The goal of these metrics is to measure web performance in a user-centric manner....
In versions 8 and 9, Lighthouse’s performance score is made of seven metrics, with each contributing a percentage of the total performance score.
Largest Contentful Paint
1. What it represents: A user’s perception of the loading experience. 2. Lighthouse Performance score weighting: 25% 3. What it measures: The point in the page load timeline when the page’s largest image or text block is visible within the viewport. 4. How it’s measured: Lighthouse extracts LCP data from Chrome’s tracing tool. 5. Is Largest Contentful Paint a Web Core Vital?Yes! 6. LCP Scoring 7. Goal: Achieve LCP in < 2.5 seconds. What Elements Can Be Part Of LCP? 1. Text. 2. Images. 3. Vide...
Total Blocking Time
1. What it represents: Responsiveness to user input. 2. Lighthouse Performance score weighting: 30% 3. What it measures: TBT measures the time between First Contentful Paint and Time to Interactive. TBT is the lab equivalent of First Input Delay (FID) – the field data used in the Chrome User Experience Report and Google’s upcoming Page Experience ranking signal. 4. How it’s measured: The total time in which the main thread is occupied by tasks taking more than 50ms to complete. If a task take...
First Contentful Paint
1. What it represents: FCP marks the time at which the first text or image is painted (visible). 2. Lighthouse Performance score weighting: 10% 3. What it measures: The time when I can see the page I requested is responding. My thumb can stop hovering over the back button. 4. How it’s measured: Your FCP score in Lighthouse is measured by comparing your page’s FCP to FCP times for real website data stored by the HTTP Archive. 5. Your FCP increases if it is faster than other pages in the HTTP A...
Methodology Matters
Out of the box, Lighthouse audits a single page at a time. A single page score doesn’t represent your site, and a fast homepage doesn’t mean a fast site. Test multiple page types within your site. Identify your major page types, templates, and goal conversion points (signup, subscribe, and checkout pages). If 40% of your site is blog posts, make 40% of your testing URLs blog pages! Example Page Testing Inventory Before you begin optimizing, run Lighthouse on each sample page and save the repo...
This is a case of many roads leading to Oz. Sure, some scarecrow might be particularly loud about a certain brick shade, but it’s about your goals. Looking to test an entire staging site? Time to learn some NPM. Have less than five minutes to prep for a prospective client meeting? A couple of one-off reports should do the trick. Whichever way you e...
PageSpeed Insightsallows you to test one page at a time. Simply enter the URL. Pros Of Running Google Lighthouse From PageSpeed Insights 1. The detailed Lighthouse report is combined with URL-specific data from the Chrome User Experience Report. 2. Opportunities and Diagnostics can be filtered to specific metrics. This is exceptionally useful when ...
The complexity of performance metrics reflects the challenges facing all sites. We use performance metrics as a proxy for user experience – that means factoring in some unicorns. Tools like Google’s Test My Site and What Does My Site Cost?can help you make conversion and customer-focused arguments for why performance matters. Hopefully, once your p...
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Sep 27, 2016 · Lighthouse is an open-source, automated tool for improving the quality of web pages. You can run it against any web page, public or requiring authentication. It has audits for performance, accessibility, progressive web apps, SEO, and more. You can run Lighthouse in Chrome DevTools, from the command line, or as a Node module.
Apr 9, 2024 · If you have a website, you probably have different tools in your toolkit to improve its user experience, performance, and speed. In this blog post, we want to introduce you to Google Lighthouse — another effective helper in SEO website optimization. Let’s get started.
Google Lighthouse is a free tool that provides powerful insights to help improve your website. By generating a Lighthouse report, you can assess any web page’s page experience and access valuable tips to improve its performance. Google has recently increased emphasis on-page experience, including adding a new set of Core Web Vital signals.
The Makapuʻu Point Light on the island of Oʻahu has the largest lens of any lighthouse in the United States. [ 1 ] [ 2 ] [ 7 ] [ 8 ] It was listed on the National Register of Historic Places in 1977.
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