[Webkit-unassigned] [Bug 159577] New: Web Inspector: Lots of time spent updating related resources in ResourceDetailsSidebar when loading a page with lots of resources

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=159577

            Bug ID: 159577
           Summary: Web Inspector: Lots of time spent updating related
                    resources in ResourceDetailsSidebar when loading a
                    page with lots of resources
    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, joepeck at webkit.org,
                    mattbaker at apple.com, nvasilyev at apple.com,
                    timothy at apple.com, webkit-bug-importer at group.apple.com

Created attachment 283192
  --> https://bugs.webkit.org/attachment.cgi?id=283192&action=review
[IMAGE] Profile - 2s under createResourceLink

Summary:
Lots of time spent updating ResourceDetailsSidebar when loading a page

See attached screenshot, 2s spent under createResourceLink during a reload of the inspector.

Backtrace:

- createResourceLink
    - _refreshRelatedResourcesSection
        - event dispatch
            - addInitiatedResource

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