To ensure that the Speed Insights feature can be used despite many different regulatory limitations around the world, we've designed it in such a way that it provides you with information without being tied to, or associated with, any individual visitor or IP address.
The recording of data points is anonymous and the Speed Insights feature does not collect or store information that would enable us to reconstruct a browsing session across pages or identify a user.
The following information is stored with every data point:
4g (or slow-2g, 2g, 3g)
Chrome 86 (Blink)
Mobile (or Desktop/Tablet)
Country (ISO 3166-1 alpha-2)
Server-Received Event Time
Please see our Privacy Notice for more information, including how Vercel Speed Insights complies with the GDPR.
Once you've followed the dashboard's instructions for enabling Speed Insights, you will have automatically redeployed your current Production Deployment, which is done to inject a script into the client-side bundle of your application.
This script will retrieve the visitor's Speed Insights by invoking native browser APIs and then report them to Vercel's servers on every page load.
Only fresh page loads report Speed Insights. Client-side page transitions will not. As an example, typing
vercel.com/blog into your address bar and hitting enter will send them. Clicking on a blog post, however, will not.