Top 1,000: State of the Web

This report captures a long view of the web, including the adoption of techniques for efficient network utilization and usage of web standards like HTTPS.

Sample Size

The number of URLs analyzed in this report.

Total Kilobytes

The sum of transfer size kilobytes of all resources requested by the page.

See also: Page Weight

Total Requests

The number of resources requested by the page.

See also: Page Weight

HTTPS Requests

The percent of all requests in the crawl whose URLs are prefixed with https.

Pages with Vulnerable JS

The percent of crawled pages that contain at least one known third-party JavaScript vulnerability. Vulnerabilities are detected by Lighthouse using data from Snyk. This metric is only available in mobile tests.

TCP Connections Per Page

The number of TCP connections per page.

HTTP/2 Requests

The percent of all requests in the crawl using HTTP/2. Note that servers supporting HTTP/2 and HTTP/3 may use HTTP/2 initially due to the way the HTTP Archive starts with a fresh Chrome instance each time, but may use HTTP/3 on subsequent requests.

HTTP/3 Support

The percent of all requests in the crawl which support HTTP/3. Note that, due to the way the HTTP Archive starts with a fresh Chrome instance each time, HTTP/3 will often not be used for initial connections until the browser is aware the server supports HTTP/3, which is why we measure support, rather than actual usage like we do for HTTP/2.

Font Display

The percent of pages that avoid the flash of invisible text (FOIT) during web font loading by using the font-display CSS property. This metric is measured by Lighthouse and is only available in mobile tests.