Hi, [...] > > To put this straight: I was thinking about web servers behind > > V.90/ISDN/ADSL lines where _that_ line usually will be the bottleneck > > on any connections to the outside world and about caching proxies > > in that outside world ... > > Yes, but if you do compression because some of your clients have low bandwith > connections (but are capable of receiving compressed pages) and access your > server via a proxy then not sending the Vary header can "poison" the cache in > a way > you do not want. Because if the client which causes the proxy to cache the > response > is not capable to receive compressed pages will cause the proxy to cache > *only* the > uncompressed version of the page.
The whole point is I don't do compression because of any _clients'_ connections, but because of the _server's_ connection! If the server's connection usually is far slower than the client's connection (like with a server behind a V.90 modem, which would be 33.6 kb/s upstream with considerable latency), it (1) would be faster for the vast majority of clients to get an uncompressed copy from their ISP's cache rather than a compressed one from the original server and (2) even if it wasn't, it still might save traffic and thus money for the server operator. Cya, Florian
