[Bug 20131] [MutationObservers] Unclear whether unique record instances are required in 5.3.2 "Queuing a mutation record"

https://www.w3.org/Bugs/Public/show_bug.cgi?id=20131

--- Comment #8 from Adam Klein <adamk@chromium.org> ---
(In reply to comment #7)
> Well, that is even more strange.
> In same cases observers might share records, in some case not.
> 
> Consistent APIs, please ;)

I don't think developers are likely to care much about the identity of records,
but I do think they care about the memory footprint of the browsers they work
in.

For what it's worth, the old queueing algorithm specified WebKit's behavior
with regard to identity (see "record" and "recordWithOldValue"):
http://www.w3.org/TR/2012/WD-dom-20120405/#concept-mo-queue-attributes

(not surprising, since I think I wrote that text).

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Received on Wednesday, 28 November 2012 21:27:11 UTC