HTTP/2.0 does not only compress headers, it also keeps a context of headers that were already sent. So if you want to include a specific header with the same va

HTTP/2.0 does not only compress headers, it also keeps a context of headers that were already sent. So if you want to include a specific header with the same value in multiple requests (like, say, a cookie), it won't actually be re-sent on the wire. The other side will know that the value hasn't changed.