[Webkit-unassigned] [Bug 70009] New: 16% of total time loading html5 spec (PerformanceTests/Parser/html5-full-render.html) is spent under updateWidgetIfNecessary

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=70009

           Summary: 16% of total time loading html5 spec
                    (PerformanceTests/Parser/html5-full-render.html) is
                    spent under updateWidgetIfNecessary
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: eric at webkit.org
                CC: abarth at webkit.org, simon.fraser at apple.com
            Blocks: 68944


16% of total time loading html5 spec (PerformanceTests/Parser/html5-full-render.html) is spent under updateWidgetIfNecessary

Running (Self)        Symbol Name
4690.0ms   21.7%                      WebCore::HTMLConstructionSite::insertHTMLElement(WebCore::AtomicHTMLToken&)
4546.0ms   21.0%                       WTF::PassRefPtr<WebCore::Element> WebCore::HTMLConstructionSite::attach<WebCore::Element>(WebCore::ContainerNode*, WTF::PassRefPtr<WebCore::Element>)
4348.0ms   20.1%                        WebCore::Element::attach()
3491.0ms   16.1%                         WebCore::ContainerNode::resumePostAttachCallbacks()
3486.0ms   16.1%                          WebCore::ContainerNode::dispatchPostAttachCallbacks()
3485.0ms   16.1%                           WebCore::HTMLPlugInImageElement::updateWidgetIfNecessary()
3485.0ms   16.1%                            WebCore::Document::updateStyleIfNeeded()
3485.0ms   16.1%                             WebCore::Document::recalcStyle(WebCore::Node::StyleChange)

basically we're updating style more often than we need to due to *two* <object> tags in the spec.

Post attach-callbacks for the loss.

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