11 posts tagged with "Lighthouse"

Reduce initial server response time is one of Lighthouse's performance audits. It evaluates the time it takes for the browser to receive the first byte of the root document (usually the main HTML file) from the server, excluding the connection setup time.

To pass the Reduce initial server response time audit, you'll mainly need to focus on your hosting environment, caching strategy, and backend performance optimization.

In this article, we'll look into what initial server response time is exactly, how it hurts web performance if it becomes too long, and how you can pass this Lighthouse audit.

Lighthouse (LH) is a free, open-source website analysis tool from Google that allows you to generate a report, which includes a list of audits that evaluate how well a web page scores on various signals.

In this post, we'll look into what Lighthouse audits are, why you often get different results for the same performance audit, and how you can generate LH reports in different environments.

Google Lighthouse is a great tool to automatically test the quality of your website and find ways to improve.

Lighthouse provides scores from 0 to 100 across four categories: Performance, Accessibility, Best Practices, and SEO. This article will focus on the Lighthouse SEO score and how to improve it.

Lighthouse is a free tool developed by Google that analyzes your website and generates a report on your page speed, accessibility, and SEO.

All you need to do is provide your website URL and Lighthouse automatically runs through a large number of individual checks (called audits). You can see how well you do on each audit and what you can do to improve.

This article looks at the different options you have for running Lighthouse what the differences are between them.

When developing a website optimizing web accessibility ensures that you don't limit the number of people who can use your site. An accessible website not only helps users with a visual or hearing impairment but also means your website can be used with the keyboard and on a wide range of devices.

Choosing the right image file type is an often overlooked, but key aspect of image optimization. The importance of using performant yet high-quality images is also reflected by Lighthouse's Serve images in next-gen formats audit, which is one of its web performance signals designed to help developers and website owners improve user experience and web performance.

While serving images in next-gen formats is a huge opportunity to improve web performance, these new image formats are not always the best option. Sometimes you can be better off using other image file types. For example, the lossless versions of the WebP and AVIF formats have questionable performance results while lossy WebP and AVIF perform great.

Lighthouse tests usually perform a non-interactive cold load. However, real users interact with the page, and load pages again with some resources already cached. User flow support in Lighthouse lets you test sites beyond the initial page load.

Lab-based performance tests often give different results from data that's collected from real users. This article explains the differences between these two ways to measure site speed and how they lead to different test results.

We'll focus on Lighthouse and the Chrome User Experience report, but note that there are many other ways to collect lab or field data.

Google released Lighthouse version 8 this week. This article looks at how the Performance score and Lighthouse report have changed compared to version 7.

Lighthouse automatically evaluates the performance, accessibility, and technical SEO of your website. But did you know that you can add your own custom tests as well?

When running page speed tests using different tools you'll often find that the metrics they report don't match up exactly, or may even show significant discrepancies.

This article explains why you might see score and metric differences between PageSpeed Insights, Lighthouse, and other tools.