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Re: Fwd: XBL2: First Thoughts and Use Cases

From: Tab Atkins Jr. <jackalmage@gmail.com>
Date: Thu, 16 Dec 2010 11:52:51 -0800
Message-ID: <AANLkTikdtGuwOp4F6vN68=p2oKaHf4bjzkAAA+d2YwD+@mail.gmail.com>
To: Boris Zbarsky <bzbarsky@mit.edu>
Cc: Dimitri Glazkov <dglazkov@google.com>, public-webapps <public-webapps@w3.org> 
On Thu, Dec 16, 2010 at 10:40 AM, Boris Zbarsky <bzbarsky@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.

~TJ
Received on Thursday, 16 December 2010 19:53:44 UTC

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