[whatwg] Prefetch issues
ian at hixie.ch
Sun Aug 8 19:48:35 PDT 2010
On Thu, 10 Jun 2010, Eric Schurman wrote:
> As described, the link prefetching capability seems to have some
> limitations that work counter to the performance of the page using it.
> It appears as though LINK elements are metadata elements and that these
> may only be supported inside the HEAD of the document. If so, then this
> is an issue in the real world, because at the time a web server flushes
> chunks containing the HEAD section of a document, the links we would
> want to prefetch are often not known. This is true for all the large
> sites I've analyzed or worked at. For example, many pages on a site will
> contain the same visual header, and we want to flush the HEAD and visual
> header content while the server is in the process of figuring out what
> the content of the page will be - which will contain the links we'd like
> to prefetch.
> Am I reading this correctly?
This was indeed a limitation of the prefetch mechanism.
> One of the simplest approaches may be to add support for rel="prefetch"
> to A and AREA's, but it's been explicitly excluded from those. Why?
No good reason. Fixed.
Ian Hickson U+1047E )\._.,--....,'``. fL
http://ln.hixie.ch/ U+263A /, _.. \ _\ ;`._ ,.
Things that are impossible just take longer. `._.-(,_..'--(,_..'`-.;.'
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