[whatwg] Script preloading

[Ryosuke Niwa]

On Sep 3, 2013, at 3:45 AM, Jake Archibald <jaffathecake at gmail.com> wrote:

> On 31 August 2013 00:04, Ryosuke Niwa <rniwa at apple.com> wrote:
> 
>> It'll be much harder to implement a new dependency API that replies on CSS
>> selectors if we care about the performance at all.
>> 
> 
> Where does the performance issue come from? It would only need to be
> resolved once on node creation or insertion into the document (the latter
> of the two). It's only used for execution, downloads can still be triggered
> without resolving the selectors (eg, by a pre-scanner).


>From the fact selector matching is slow.  I'm opposed to adding selector dependency unless there is a very important use case that can't be addressed by referring to a script by an element id or a script filename.

- R. Niwa