[Webkit-unassigned] [Bug 217611] New: Javascript regex(?) locks up tab for 30ish seconds

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=217611

            Bug ID: 217611
           Summary: Javascript regex(?) locks up tab for 30ish seconds
           Product: WebKit
           Version: Other
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKitGTK
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mail at tim-lange.me
                CC: bugs-noreply at webkitgtk.org

Created attachment 411120

  --> https://bugs.webkit.org/attachment.cgi?id=411120&action=review

Timeline Screenshot

Hi,

on both moodle instances of my university WebKitGTK the tab gets unresponsive for like 30 seconds. This does not happen in Safari, Chrome or Firefox.

This issue is also reproducible for me on the moodle demo instance:
1. https://sandbox.moodledemo.net
2. Login as student
3. Load the dashboard (https://sandbox.moodledemo.net/my/)

I already tried running Epiphany with WEBKIT_DISABLE_COMPOSITING_MODE=1, but the problem persists.

OS: Fedora 32, Epiphany 3.36.4
HW: PC with i5-3570k/T470 with i5-7200u

I attached a timeline showing the function that takes unusually long.

Kind Regards
Tim

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