[Webkit-unassigned] [Bug 103017] New: [Shadow] Distribution seems take O(N^2) where N is the number of host children

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=103017

           Summary: [Shadow] Distribution seems take O(N^2) where N is the
                    number of host children
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML DOM
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: shinyak at chromium.org
                CC: webcomponents-bugzilla at chromium.org
            Blocks: 103016


We would like make this O(N).

According to my micro benchmark:

#host children -> distribution time
100 -> 67 [us]
200 -> 203 [us]
300 -> 497 [us]
400 -> 1331 [us]
500 -> 2084 [us]

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