Reuse of responses

[mnot]

The specification of no-store can be read to allow the response to be reused for another concurrent request, since it's specified in terms of non-volatile memory. Likewise, other cache directives are silent on such reuse.

So-called "request collapsing" has become quite common in proxies, reverse proxies and CDNs. Clarification as to whether such reuse for temporally concurrent requests would be helpful (in the case of no-store and otherwise).

[jyasskin]

This also seems related to preload and prefetch, which allow the response to be re-used after cache control would say not to re-use it: whatwg/fetch#590 (comment)

[mnot]

Discussed in Montreal; introduce the concept of a single-use response, and carve out no-store.