Speed Insights Overview
Speed Insights is available on all plans
- To set up Speed Insights for your project, see the Quickstart.
- To understand who is visiting your site, use Web Analytics.
Vercel Speed Insights provides you with a detailed view of your website's performance metrics, based on Core Web Vitals, enabling you to make data-driven decisions for optimizing your site. For granular visitor data, use Web Analytics.
The Speed Insights dashboard offers in-depth information about scores and individual metrics without the need for code modifications or leaving the Vercel dashboard.
Speed Insights is available on every plan for free and includes the Real Experience Score (RES). Upgrade a project to Speed Insights Plus to unlock all Core Web Vitals, breakdowns, and Drains. See limits and pricing for more information.
To learn more, see the dashboard view and metrics, or follow the quickstart.
You can access the dashboard by selecting your project in the Vercel dashboard, and clicking Speed Insights in the sidebar.
The Speed Insights dashboard displays data that you can sort and inspect based on a variety of parameters:
- Device type: Toggle between mobile and desktop.
- Environment: Filter by preview, production, or all environments.
- Time range: Select the timeframe dropdown in the top-right of the page to choose a predefined timeframe. Alternatively, select the Calendar icon to specify a custom timeframe. The available durations vary, depending on the account type and Speed Insights version.
- Performance metric: Switch between parameters that include Real Experience Score (RES), First Contentful Paint (FCP) and Largest Contentful Paint (LCP), and use the views to view more information. Individual Core Web Vitals require Speed Insights Plus.
- Performance metric views: When you select a performance metric, the dashboard displays three views:
- Time-based line graph that, by default, shows the P75 percentile of data for the selected metric data points and time range. You can include P90, P95 and P99 in this view.
- Kanban board that shows which routes, paths, or HTML elements need improvement (URLs that make up less than 0.5% of visits are not shown by default). Poor rows and element selectors require Speed Insights Plus.
- Geographical map showing the experience metric by country. Requires Speed Insights Plus:
Geographic map of the P75 score where the color intensity indicates the relative amount of data points per country
The data in the Kanban and map views is selectable so that you can filter by country, route, path and HTML element. The red, orange and green colors in the map view indicate the P75 score.
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