[Webkit-unassigned] [Bug 240865] New: [GTK] Webpages completely slow down when CSS blur filter is in use

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=240865

            Bug ID: 240865
           Summary: [GTK]  Webpages completely slow down when CSS blur
                    filter is in use
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: PC
                OS: Linux
            Status: NEW
          Keywords: Gtk
          Severity: Normal
          Priority: P3
         Component: WebKitGTK
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: tri.voxel at gmail.com
                CC: bugs-noreply at webkitgtk.org

In recent WebkitGTK versions, when encountering an image with the CSS property filter: blur *px; the webpage performance can drop to over ten seconds per frame, essentially making the page unusable. This could have something to do with my high DPI monitor, but regardless, this is on a fairly high end PC with Ryzen 7 and dedicated GPU. This issue can be observed on Reddit when a post marked as "Spoiler" appears. The element takes an image and blurs it with a value of 60px, which brings the browser to its knees.

Browser:
GNOME Web v42.2 (and earlier versions)
System:
AMD Ryzen 7 CPU
AMD RX 5700 XT GPU
GNOME on Wayland (also happens on X11)

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