[Webkit-unassigned] [Bug 280920] New: [GTK] [Skia] Minibrowser is slow to scroll in 4K HiDPI on immigration consulting website's front page

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=280920

            Bug ID: 280920
           Summary: [GTK] [Skia] Minibrowser is slow to scroll in 4K HiDPI
                    on immigration consulting website's front page
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKitGTK
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: nekohayo at gmail.com
                CC: bugs-noreply at webkitgtk.org

Created attachment 472813

  --> https://bugs.webkit.org/attachment.cgi?id=472813&action=review

Sysprof 47 capture launching MiniBrowser

I found another situation where Epiphany 47.0 / WebKitGTK 2.46's MiniBrowser has slow scrolling performance even with the Skia version, on Intel Kabylake "iris" graphics on Fedora 41's Wayland GNOME session.

The test case is simply to load https://tabib.ca and scroll up and down a little bit with the touchpad (i.e. so that the big main banner below the navbar moves up and down).

Attached is a sysprof capture with WebKit marks.

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