[Webkit-unassigned] [Bug 10264] New: need ancestorChainHasListenerOfType(type) to avoid malloc during event dispatch

[bugzilla-daemon at opendarwin.org]

http://bugzilla.opendarwin.org/show_bug.cgi?id=10264

           Summary: need ancestorChainHasListenerOfType(type) to avoid
                    malloc during event dispatch
           Product: WebKit
           Version: 420+ (nightly)
          Platform: Macintosh
        OS/Version: Mac OS X 10.4
            Status: NEW
          Severity: normal
          Priority: P4
         Component: New Bugs
        AssignedTo: webkit-unassigned at opendarwin.org
        ReportedBy: macdome at opendarwin.org


need ancestorChainHasListenerOfType(type) to avoid malloc during event dispatch

Certain events could benifit from a function to check if any ancestor has a
listener of a specific type.

Such events include:
SVGLoad
mouseMoved
and DOM Mutation events

This would allow us to trade a treewalk for a malloc.  The treewalk is likely
to be less expensive.

This would also require us to re-work how event listeners are stored.  Using a
HashMap<AtomicString, Vector<EventListenter> > would be required instead, to
allow O(1) lookup of events based on type.


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