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PageSpeed helps you measure and optimize the speed of your web pages on all devices. Learn how to use PageSpeed Insights, Lighthouse, and other tools and resources to improve your web performance.
- PageSpeed Insights
Running analysis. More on PageSpeed Insights What's new...
- PageSpeed Insights
Running analysis. More on PageSpeed Insights What's new Documentation Learn about Web Performance Ask questions on Stack Overflow Mailing list.
Pingdom offers a free tool to test and improve your website load speed. See how your site performs in different stages, content types, and server response codes.
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Use PageSpeed Insights, PageSpeed Modules, Google Public DNS, hosted libraries and other tools to make your web site faster and more secure. Learn about the latest web performance standards and best practices from Google.
- Real-User Experience Data
- Lab Diagnostics
- Frequently Asked Questions
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Real-user experience data in PSI is powered by the Chrome User Experience Report (CrUX) dataset. PSI reports real users' First Contentful Paint (FCP), Interaction to Next Paint (INP), Largest Contentful Paint (LCP), and Cumulative Layout Shift (CLS) experiences over the previous 28-day collection period. PSI also reports experiences for the experim...
PSI uses Lighthouseto analyze the given URL in a simulated environment for the Performance, Accessibility, Best Practices, and SEO categories.
What device and network conditions does Lighthouse use to simulate a page load?
Currently, Lighthouse simulates the page load conditions of a mid-tier device (Moto G4) device on a mobile networkfor mobile, and an emulated-desktop with a wired connection for desktop. PageSpeed also runs in a Google datacenter that can vary based on network conditions, you can check the location that the test was by looking at the Lighthouse Report's environment block: Note: PageSpeed will report running in one of: North America, Europe, or Asia.
Why do the field data and lab data sometimes contradict each other?
The field data is a historical report about how a particular URL has performed, and represents anonymized performance data from users in the real-world on a variety of devices and network conditions. The lab data is based on a simulated load of a page on a single device and fixed set of network conditions. As a result, the values may differ. See Why lab and field data can be different (and what to do about it)for more info.
Why is the 75th percentile chosen for all metrics?
Our goal is to make sure that pages work well for the majority of users. By focusing on 75th percentile values for our metrics, this ensures that pages provide a good user experience under the most difficult device and network conditions. See Defining the Core Web Vitals metrics thresholdsfor more info.
PageSpeed Insights (PSI) reports on the user experience of a page on both mobile and desktop devices, and provides suggestions on how to improve it. PSI uses Lighthouse to analyze the page and shows real-user data from the Chrome User Experience Report (CrUX) dataset.
29 de nov. de 2022 · Saiba o que é e como usar a ferramenta gratuita do Google para analisar e otimizar a performance de sites em relação ao tempo de carregamento. Veja também a importância da velocidade para a experiência do usuário e o ranking no Google.
PageSpeed Insights (PSI) é uma ferramenta gratuita do Google que auxilia na medição da velocidade de carregamento de uma página da web. A ferramenta Lighthouse coleta, processa e analisa dados de laboratório que são combinados com dados do mundo real do Chrome User Experience Report.
