[Webkit-unassigned] [Bug 75683] New: Container::willRemove and Node::detach consumes 4.7% of time on Dromaeo's DOM Modification tests

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=75683

           Summary: Container::willRemove and Node::detach consumes 4.7%
                    of time on Dromaeo's DOM Modification tests
           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: rniwa at webkit.org
                CC: darin at apple.com, koivisto at iki.fi, kling at webkit.org


Profiled WebKit r104262 on http://dromaeo.com/?dom while running DOM modification tests. The result indicates that we spend a significant amount of time in willRemove and detach:

We spend 2.5% of time on ContainerNode::willRemove and 2.2% of time in detach.

We also spend 2.2% of time in isReachableFromOpaqueRoots and fastFree/fastMalloc but those are understandable. Also, we're spending 1.4% in Text::create and 1.3% in Text::~Text.

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