[Webkit-unassigned] [Bug 38557] r58526 introduced a ~30% regression on Dromaeo JS lib

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=38557





--- Comment #16 from anton muhin <antonm at chromium.org>  2010-05-06 22:25:12 PST ---
(In reply to comment #14)
> (In reply to comment #13)
> > BTW, Darin, do you remember why it was decided that we need to retain cached
> > node lists as long as node is alive?  I remember it was due to failing layout
> > tests, but is it indeed desired semantics?
> > 
> > I'll check tomorrow HTML5 wording, but any insights are most appreciated.
> 
> The general principle is that garbage collection must not be detectable. So if
> someone adds custom properties to a node list it’s important we don’t lose
> those. That’s the main concept. The rest is just about performance tuning, I
> suppose.

Darin, I'll respond somewhat later---I need to carry on couple of experiments
before.

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