PageSpeed Insights

About PageSpeed Insights

Page Speed Insights measures the performance of a page for mobile devices and desktop devices. It fetches the url twice, once with a mobile user-agent, and once with a desktop-user agent.

The PageSpeed Score ranges from 0 to 100 points. A higher score is better and a score of 85 or above indicates that the page is performing well. Please note that PageSpeed Insights is being continually improved and so the score will change as we add new rules or improve our analysis.

PageSpeed Insights measures how the page can improve its performance on:

  • time to above-the-fold load: Elapsed time from the moment a user requests a new page and to the moment the above-the-fold content is rendered by the browser.
  • time to full page load: Elapsed time from the moment a user requests a new page to the moment the page is fully rendered by the browser.

However, since the performance of a network connection varies considerably, PageSpeed Insights only considers the network-independent aspects of page performance: the server configuration, the HTML structure of a page, and its use of external resources such as images, JavaScript, and CSS. Implementing the suggestions should improve the relative performance of the page. However, the absolute performance of the page will still be dependent upon a user’s network connection.

Each suggestion is rated with a priority indicator to indicate its importance:

IconNameDescription
red exclamation pointFixing this would have a measurable impact on page performance.
yellow exclamation pointConsider fixing this if it is not a lot of work.
green check markNo significant issues found. Good job!
Our most recent update to PageSpeed Insights focuses on improving mobile performance. You can learn more by reading about mobile analysis in PageSpeed Insights or by watching our talk at Google I/O 2013 on Instant Mobile Websites.

You may also be interested in seeing the complete list of analysis performed by PageSpeed Insights.

Send us your feedback

We would appreciate any feedback you would like to give about PageSpeed Insights. If you have suggestions on the testing tool or our recommended best practices, please post them to our discussion group at page-speed-discuss.

Questions?

If you have questions about PageSpeed Insights, please refer to our FAQ or post a message to our discussion group.

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