Historically, k6 browser has reported only a few browser metrics, such as `browser_loaded` and `browser_dom_content_loaded`. Web Vitals are the current standard engineers use to measure the user experience for a website. When it comes to browser performance metrics, both k6 browser and Lighthouse report Google Web Vitals. k6 browser, on the other hand, supports a hybrid approach by leveraging the existing functionality of k6. Lighthouse measures only the frontend performance of your application, so you will need to use another tool to measure the backend performance. A recommended approach is hybrid performance testing, which combines protocol-level tests with browser-level tests simultaneously. Web performance testing strategyĪ holistic performance testing strategy must account for both frontend and backend performance. To run a test, navigate to PageSpeed Insights, enter the URL you want to audit, and see a report of your website’s performance. It uses real-world data on top of the lab data Lighthouse uses. PageSpeed Insights is another free tool that lets you run Lighthouse tests. Open up DevTools and use the Lighthouse tabįor more flexibility or advanced use, the Google Lighthouse library can programmatically run audits with the command line or as a Node module.The most convenient way to run a Lighthouse test is with Chrome DevTools: You can also perform Lighthouse audits with tools such as WebPageTest and testing frameworks such as Playwright and Cypress. Programmatically via the Google Lighthouse library.On the other hand, a Lighthouse test can be generated in multiple ways, including: However, work is underway to make k6 browser available as part of Grafana Cloud k6. Header: page.locator('h2').textContent() = 'Welcome, admin!',Ī k6 browser test can be run only with k6 OSS. Page.locator('input').type('123') Ĭonst submitButton = page.locator('input') Īwait Promise.all() To measure the performance of your website, k6 browser provides an API similar to Playwright for some familiarity. The table below summarizes key comparison points between k6 browser and Lighthouse: Running a web performance test Web performance tools comparisonĪgain, while both k6 browser and Google Lighthouse measure web application performance, they differ in several ways. These audits generate scores and a report with suggested changes to improve website quality. Apart from measuring performance, Google Lighthouse runs audits for accessibility, SEO, and more. Google Lighthouse is an open source tool that you can use to improve the overall quality of your websites. Google Lighthouse: Measure overall website quality With k6 browser, you can also mix browser-level scripts with existing protocol-level scripts to implement a hybrid approach to performance testing. When a k6 browser test finishes, it reports browser metrics that you can use as guidelines for your website’s performance. With k6 browser, you can simulate a specific user journey on your website and find errors related to the user experience. K6 browser automates browser actions and collects frontend performance metrics as part of your existing k6 tests. Both k6 browser and Google Lighthouse can measure the performance of web applications, but there are key differences between the two. When developing web applications, it’s crucial to test performance from a frontend or browser perspective - a concept we explain comprehensively in our guide to website load testing. The goal of this blog post is to compare the k6 browser module - not the entire k6 ecosystem - with Google Lighthouse. Note: k6 browser is a part of Grafana k6 OSS. How these tools help with performance testing.This blog post compares k6 browser and Google Lighthouse from various perspectives, including: Since launching the module in 2021, we’re frequently asked how it compares to Google Lighthouse as a tool to measure web page performance. The Grafana k6 browser module simulates how users interact with a browser page and collects web performance metrics about the interaction.
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