560511 - Investigate how to optimize mutation obverser handling

Status: RESOLVED DUPLICATE of bug 518562

(Core :: DOM: Core & HTML, defect)

Description

[Olli Pettay [:smaug][[e-mail]]]

I wonder if we could speed up mutation observer handling by reducing
extra addrefs/releases and some virtual calls.

Perhaps when registering an observer it should tell what kinds of
notifications it wants to get and then for other kinds of there
is no need to addref/release and call dummy methods.

Also, would it be too scary to require that observers keep themself alive
during methods calls. Right now nodeutils has nsCOMPtr when it calls
mutation observer methods, but perhaps not all listeners need that.

Comment 1

[Boris Zbarsky [:bzbarsky]]

Note bug 518562?  This seems like a dup.

Comment 2

[Olli Pettay [:smaug][[e-mail]]]

heh. How could I remember all the bugs I file :)