One of the first optimizations large/high traffic sites will do, is cache pages for logged out users. even if the cache is only valid for a minute, that's still a huge reduction in server traffic.
The cache is faster because its not having to talk to the database, and can be done at by the load balancing layers rather then the actual application layer.
Wikipedia does this too (although, via a layer to add back on the ip talkpage header).
The cache is faster because its not having to talk to the database, and can be done at by the load balancing layers rather then the actual application layer.
Wikipedia does this too (although, via a layer to add back on the ip talkpage header).