[Webkit-unassigned] [Bug 152903] New: Web Inspector: Timeline Cleanup: Better Timeline Record for Microtask Checkpoints

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=152903

            Bug ID: 152903
           Summary: Web Inspector: Timeline Cleanup: Better Timeline
                    Record for Microtask Checkpoints
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: joepeck at webkit.org
                CC: bburg at apple.com, graouts at webkit.org,
                    joepeck at webkit.org, mattbaker at apple.com,
                    nvasilyev at apple.com, timothy at apple.com,
                    webkit-bug-importer at group.apple.com

* SUMMARY
Timeline Cleanup: Wrapping Record for Microtask Checkpoints

Microtask checkpoints show up at unusual times in script execution. It would be good if this was better identified in Timelines.

* NOTES
- LayoutTests/fast/dom/microtask-promise-mutation-observer-order.html has some examples
- Microtasks:
  - Mutation Observers
  - Promise reactions

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