The preload value of the element's rel attribute lets you declare fetch requests in the HTML's| MDN Web Docs
Page Weight chapter of the 2022 Web Almanac covering why page weight matters, bandwidth, complex pages, page weight over time, page requests, and file formats.| almanac.httparchive.org
Performance chapter of the 2022 Web Almanac covering Core Web Vitals, with deep dives into the Largest Contentful Paint, Cumulative Layout Shift, and First Input Delay metrics and their diagnostics.| almanac.httparchive.org