Re: [Resource Timing] Definition of "network layer cache"

I think "network layer cache" should be redefined in such a way to make
Blink's behavior incompliant. The Blink memory cache is just another cache
in the cache hierarchy.


On Fri, Apr 12, 2013 at 3:40 PM, James Simonsen <simonjam@google.com> wrote:

> The Resource Timing spec says:
>
> "Resources that are retrieved from the user agent's networking layer cache
> must be included as PerformanceResourceTiming objects in the Performance
> Timeline."
>
> What exactly constitutes a "networking layer cache?" Blink's memory cache
> seems to behave differently than IE10's. When navigating pages on the same
> site, Blink uses the "in-memory cache" and reuses subresources without
> fetching. That means we don't report Resource Timing for these resources.
> IE10 seems to always report resources in the same circumstances.
>
> To try it out, visit webpagetest.org. Note the "site.js loaded in x
> milliseconds" at the bottom of the page. Browse to the "About" page on
> webpagetest.org. That message disappears on Chrome, it shows a new value
> on IE10.
>
> Are we both compliant in our own ways? Or do we need to better define
> "network layer cache?"
>
> James
>