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Fast and optimized pages lead to higher visitor engagement, retention, and conversions. The PageSpeed family of tools is designed to help you optimize the performance of your website. PageSpeed Insights products will help you identify performance best practices that can be applied to your site, and PageSpeed optimization tools can help you automate the process.
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:
Each suggestion is rated with a priority indicator to indicate its importance:
|red exclamation point||Fixing this would have a measurable impact on page performance.|
|yellow exclamation point||Consider fixing this if it is not a lot of work.|
|green check mark||No significant issues found. Good job!|
The 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 at Google I/O 2013 on Instant Mobile Websites.
When you profile a web page with Page Speed, it evaluates the page’s conformance to a number of different rules. These rules are general front-end best practices you can apply at any stage of web development. Page Speed provide documentation of each of the rules here, so whether or not you run the Page Speed tool — maybe you’re just developing a brand new site and aren’t ready to test it — you can refer to these pages at any time. Page Speed give you specific tips and suggestions for how you can best implement the rules and incorporate them into your development process.
Page Speed evaluates performance from the client point of view, typically measured as the page load time. This is the lapsed time between the moment a user requests a new page and the moment the page is fully rendered by the browser. The best practices cover many of the steps involved in page load time, including resolving DNS names, setting up TCP connections, transmitting HTTP requests, downloading resources, fetching resources from cache, parsing and executing scripts, and rendering objects on the page. Essentially Page Speed evaluates how well your pages either eliminate these steps altogether, parallelize them, and shorten the time they take to complete. The best practices are grouped into six categories that cover different aspects of page load optimization:
High performance web sites lead to higher visitor engagement, retention and conversions
Get your PageSpeed score and use PageSpeed suggestions to make your web site faster through our online tool.
Analyze your website directly in Chrome or Firefox and use PageSpeed suggestions to make your web site faster.
Let us optimize your web site and serve it from Google infrastructure for maximum performance.
Run the open source PageSpeed module on your Apache or Nginx server to automatically rewrite and optimize resources on your web site.
Leverage Google’s Public DNS to improve security and speed of your browsing experience.
Learn about WebP, an open-source image format that provides 30% better image compression.
Learn about SPDY, a protocol designed for low-latency transport of content over the World Wide Web.
Learn about the latest protocols and web standards designed to make the web faster.
Dive into performance web practices to learn about latest performance web optimizations for your web-site.
There are many ways to make websites run faster. In this section, you can discover performance best practices that real web professionals employ in their everyday work. These practices have improved the user experience for millions of users and we hope they are useful for other web developers.