View Performance scan results

Learn how to view and interpret Performance scan results for your website.

To review the scan results, select the scan you created from the Scan Summary page and click the View Report link.

Review generated report for Performance scan

The Performance scanner helps you monitor key web performance metrics, such as Core Web Vitals (CWV), across different pages. You can identify regressions, track performance trends, and improve user experience over time.

The report displays a list of scanned URLs along with their associated CWV scores. Each CWV metric is color-coded based on its status:

• Green: Good
• Orange: Needs Improvement
• Red: Poor

View CWV Details

Analyze key performance metrics for individual pages. Each URL detail includes the following metrics:

• Largest Contentful Paint (LCP): Measures loading performance.
• Interaction to Next Paint (INP): Reflects real user input delay, which cannot be measured reliably in test environments. If INP cannot be calculated, the report shows Total Blocking Time (TBT), which is a synthetic alternative to INP that approximates interactivity.
• Cumulative Layout Shift (CLS): Measures visual stability.
• First Contentful Paint (FCP): Measures time to render the first visible element.
• Time to First Byte (TTFB): Measures time taken for the browser to receive the first byte of data.

For each metric, you can view:

• The current status of the page (good, needs improvement, or poor).
• The value range that defines each status level.

You can filter the results by device type and CWV severity to focus on specific performance data. You can also download the data as a .csv file by using the Export button.