Report: Loading Speed

Web performance can directly impact business metrics like conversion and user happiness. This report analyzes various performance metrics in the lifecycle of a loading page including those used by many modern progressive web apps.

First Contentful Paint

The number of seconds from the time the navigation started until the page's primary content appears on the screen.

Time to Consistently Interactive

The number of seconds from the time the navigation started until the page is fully interactive and the network is idle. This metric comes from Lighthouse as is only available in mobile tests.

Time to First Interactive

The number of seconds from the time the navigation started until the layout is stabilized, web fonts are visible, and the page is responsive to user input. This metric comes from Lighthouse as is only available in mobile tests.

DOMContentLoaded

The number of seconds from the time the navigation started until the initial HTML document has been completely loaded and parsed. See the DOMContentLoaded event on MDN for more info.

onLoad

The number of seconds from the time the navigation started until the document and all of its dependent resources have finished loading. See the load event on MDN for more info.

JavaScript Boot-up Time

The amount of CPU time each script consumes per page. This metric comes from Lighthouse and is only available in mobile tests.

See also: State of JavaScript