On 12/16/2010 11:52 AM, Tab Atkins Jr. wrote:
On Thu, Dec 16, 2010 at 10:40 AM, Boris Zbarsky<bzbar...@mit.edu> wrote:
On 12/15/10 11:29 AM, Dimitri Glazkov wrote:
That seems like an implementation detail. Metadata can be shared and
cloned as needed, just like styles in CSS.
Sort of. It would need to be cloned as soon as the shadow tree is mutated,
right? That seems like very fragile behavior from a web author point of
view, where it's easy to deoptimize without realizing it.
At least we can produce simple advice on how to definitely avoid
deoptimizing - stick with the declarative syntax and don't mutate the
shadow.
With luck, enough use-cases will be solveable with the declarative
syntax that this will be an acceptable restriction.
Well, at least with XBL1 modifying the shadow tree is very common.
And I would assume that to be rather common with XBL2 too.
-Olli
~TJ
