Detect request coalescing?

Dridi Boukelmoune dridi at
Fri Jul 31 05:56:49 UTC 2020

On Thu, Jul 30, 2020 at 7:30 PM Batanun B <batanun at> wrote:
> Just a quick question that I wasn't able to find any information on using regular google searches. Is it possible to detect request coalescing somehow? Meaning that, when looking at the response headers, can I somehow see that the request had to wait for another request for the same resource to finish, before this request could return? Can I somehow detect that in VCL, and add a custom header with that information?


I don't think you can do that.


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