NEW70649
[MutationObservers] Implement constant-time lookup of observers 
https://bugs.webkit.org/show_bug.cgi?id=70649
Summary [MutationObservers] Implement constant-time lookup of observers
Rafael Weinstein
Reported 2011-10-21 14:16:07 PDT
If all observers are registered at the document-level (and the document stores this information), we can avoid having to walk up the tree to look for observers. This is likely to be a common case and worth fast-path-ing.
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Adam Klein
Comment 1 2012-02-09 15:26:42 PST
Remove as a blocking bug; we've got this in mind as a performance optimization once we've seen more of the usecases of MutationObservers in the wild.
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