One more question - this applies to both <link rel=prefetch> and 
speculation rules, right? Developers would need to set (at least) short 
lifetime cache-control headers for both?

On Thursday, November 28, 2024 at 11:26:51 AM UTC+1 Yoav Weiss wrote:

> Also, seems worthwhile for +Barry Pollard <barrypoll...@google.com> or 
> someone else to make some noise on that front..
>
> On Thu, Nov 28, 2024 at 11:22 AM Yoav Weiss (@Shopify) <
> yoavwe...@chromium.org> wrote:
>
>>
>>
>> On Thu, Nov 28, 2024 at 11:19 AM Noam Rosenthal <nrosent...@chromium.org> 
>> wrote:
>>
>>> On Thu, Nov 28, 2024 at 10:11 AM Yoav Weiss (@Shopify)
>>> <yoavwe...@chromium.org> wrote:
>>> >
>>> > Refreshing my memory, as it's been a while - shipping this means that 
>>> web developers would need to set their HTML's caching headers to be 
>>> cacheable (even with a short lifetime) to ensure that prefetches are 
>>> actually useful?
>>>
>>> Correct.
>>>
>>> >
>>> > Should we add some console logs (and maybe web-exposed reports) on 
>>> prefetches that are not cacheable? (as a followup)
>>>
>>> I wouldn't use console logs for this kind of thing, that's a very
>>> crowded piece of real estate. But some sort of performance-panel
>>> insights perhaps?
>>>
>>
>> Sure, I meant "console logs" as a generic term for "surfacing this info 
>> to developers in the lab". I have no strong opinions regarding the specific 
>> surface.
>>
>>

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