[Webkit-unassigned] [Bug 90367] New: High cost operation (ContextFeatures::shadowDOMEnabled) is called frequently in editing.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=90367

           Summary: High cost operation
                    (ContextFeatures::shadowDOMEnabled) is called
                    frequently in editing.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML Editing
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: hayato at chromium.org
                CC: dglazkov at chromium.org, rniwa at webkit.org,
                    dominicc at chromium.org, morrita at google.com,
                    shinyak at chromium.org, tasak at google.com


ContextFeatures::shadowDOMEnabled(), which is not a light operation, is called frequently in editing, such as in Position::findParent().
That causes unresponsiveness if some conditions are met.

Chromium side bug:
http://code.google.com/p/chromium/issues/detail?id=134398

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