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The problem to solve is a form of stampeding heardherd: When a cached object goes stale, instead of potentially letting 100's or 1000's of requests slip through to the origin, we want to minimize this as much as possible. In a best case scenario,  a redux to 1 origin connection could be achieved. One issue here is to know if a request is cacheable (and therefore shareable). On a complete cache miss (cold cache), this can be difficult at best. On a cache

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