- From: Olli Pettay <Olli.Pettay@helsinki.fi>
- Date: Thu, 16 Dec 2010 12:23:22 -0800
- To: "Tab Atkins Jr." <jackalmage@gmail.com>
- CC: Boris Zbarsky <bzbarsky@mit.edu>, Dimitri Glazkov <dglazkov@google.com>, public-webapps <public-webapps@w3.org>
On 12/16/2010 11:52 AM, Tab Atkins Jr. wrote: > 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. 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 > >
Received on Thursday, 16 December 2010 20:24:09 UTC