Methodology

Websites Tested 5.8M Data Processed 20.9 TB

Unless otherwise noted, the metrics in all of the 20 chapters of the Web Almanac are sourced from the HTTP Archive dataset. HTTP Archive is a community-run project that has been tracking how the web is built since 2010. Using WebPageTest and Lighthouse under the hood, metadata about nearly 6 million websites are tested monthly and included in a public BigQuery database for analysis. The July 2019 dataset was used as the basis for the Web Almanac's metrics. For more information, see the Methodology page.