[Webkit-unassigned] [Bug 109191] New: [CSS Regions] Adding regions at the end of the region chain to accommodate overflow triggers a relayout for the whole region chain

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=109191

           Summary: [CSS Regions] Adding regions at the end of the region
                    chain to accommodate overflow triggers a relayout for
                    the whole region chain
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: mibalan at adobe.com
                CC: WebkitBugTracker at adobe.com
            Blocks: 57312


The consequence is that the time for adding a new region increases linearly with the number of regions.

This becomes especially apparent when adding regions in a while loop that queries the overset property of the NamedFlow.

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