[webkit-changes] [WebKit/WebKit] 8415d6: Add signposts for milestones relevant for page loa...

[Simon Fraser]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 8415d69d47cb3f936b26017a8d47a9d4fefb660b
      https://github.com/WebKit/WebKit/commit/8415d69d47cb3f936b26017a8d47a9d4fefb660b
  Author: Simon Fraser <simon.fraser at apple.com>
  Date:   2023-07-17 (Mon, 17 Jul 2023)

  Changed paths:
    M Source/WebCore/dom/Document.cpp
    M Source/WebCore/page/LocalDOMWindow.cpp
    M Source/WebCore/page/LocalFrameView.cpp

  Log Message:
  -----------
  Add signposts for milestones relevant for page loading
https://bugs.webkit.org/show_bug.cgi?id=259005
rdar://111931790

Reviewed by Ben Nham and Ryosuke Niwa.

Add os_signpost logs for DOMContentLoaded, First Meaningful Paint (used internally), First Contentful Paint
(used by Performance Timeline) and the Load event. These all fire only for the main frame.

* Source/WebCore/dom/Document.cpp:
(WebCore::Document::enqueuePaintTimingEntryIfNeeded):
(WebCore::Document::finishedParsing):
* Source/WebCore/page/LocalDOMWindow.cpp:
(WebCore::LocalDOMWindow::dispatchLoadEvent):
* Source/WebCore/page/LocalFrameView.cpp:
(WebCore::LocalFrameView::firePaintRelatedMilestonesIfNeeded):

Canonical link: https://commits.webkit.org/266121@main