- From: Yoav Weiss <yoav@yoav.ws>
- Date: Wed, 25 Jun 2014 15:53:38 +0200
- To: Peter Lepeska <bizzbyster@gmail.com>
- Cc: "public-web-perf@w3.org" <public-web-perf@w3.org>
- Message-ID: <CACj=BEhYMEuGwLvExTSdetJy=+Po3wZMRZtSiWDcsbWx_HMgJQ@mail.gmail.com>
Hi Peter, I have a couple of questions regarding these additions: * Caching hints - What is the benefit from adding those? Avoiding a conditional request+304 if the resource is cached & stale, but still relevant? * Preresolution - What is the scenario where you would be forced to go through the redirect if you already know the final URL of the redirection chain (especially if it's a 301 response)? In other words, why hint it, if you could explicitly direct your iframe at it? Is it relevant only to appliances that have a hard time modifying the HTML itself? Cheers, Yoav On Mon, Jun 23, 2014 at 8:32 PM, <bizzbyster@gmail.com> wrote: > Ilya, > > Two additions to your doc: > https://docs.google.com/document/d/1HeTVglnZHD_mGSaID1gUZPqLAa1lXWObV-Zkx6q_HF4/edit > . > > Cache hints: > We talked about the idea of supplying version information in preload (or > subresource) hints via the sub-resource integrity attribute. But I'm not > crazy about that idea b/c it means the browser needs to load an object from > the browser disk cache and run a checksum on it in order to check whether > or not that resource is the same as the one in the preload hint. Why not > just allow us to specify cache version information via Last-Modified-Time > and/or Etag? This makes it easy and fast to check to see if the cached > version is current or not. Perhaps this could be a new attribute (version?) > of the LINK header? > > Preresolutions: > Also, it would be great if we could specify the result of DNS lookups and > also inline HTTP responses. So, for instance, let's say I have a site > called simple.html that has an iframe hosted by a third party site. That > third party site includes a URL that always receives a 301 Permanent > redirect. It'd be great if we could optimize the loading of the page by > simply including that 301 response code and Location header in as a > "preresolution" up front along with the other resource hints. > > Thoughts? Anyone else? > > Peter > > >
Received on Wednesday, 25 June 2014 13:54:11 UTC