[Webkit-unassigned] [Bug 247853] New: Web Inspector: Timelines Tab: Poor performance makes it almost unusable

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=247853

            Bug ID: 247853
           Summary: Web Inspector: Timelines Tab: Poor performance makes
                    it almost unusable
           Product: WebKit
           Version: Safari 16
          Hardware: Mac (Apple Silicon)
               URL: https://www.bieseckerart.com/gallery
                OS: macOS 13
            Status: NEW
          Keywords: Performance
          Severity: Major
          Priority: P2
         Component: Web Inspector
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sloths.slushy-0m at icloud.com
                CC: inspector-bugzilla-changes at group.apple.com

When using the Timelines Tab to monitor website performance, the performance is so poor that it effectively makes the tool unusable.

Steps to reproduce:
1) Navigate to https://www.bieseckerart.com/gallery
2) Start an Events recording
3) Hover over some of the images and click on them to open the image modal
4) Close the modal and repeat

Expected Result:
The timeline view continues to remain responsive and can easily be stopped, started, etc.

Observed Result:
The web inspector, and the rest of the page, becomes extremely unresponsive very quickly.

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