The time (in milliseconds), including the network time from users’ locations to the site’s server, the browser takes to parse the document and execute deferred and parser-inserted scripts (DOMContentLoaded). When parsing of the document is finished, the Document Object Model (DOM) is ready, but the referenced style sheets, images, and subframes may not be finished loading. This is often the starting point of Javascript framework execution, e.g., JQuery’s onready() callback.