FeedShow

When a feed has not changed since the last fetch, a server can answer the request with a “304 HTTP code”. Not all servers have this feature enabled, and the result is bandwidth loss.
Here’s a good idea from Scott (Feedlounge). Servers that are “304 enabled” will have their feeds refreshed faster than the others.

Geof F. Morris also listed some reasons why this should be implemented.

I like this idea and will implement it in FeedShow crawler. Crawling the feeds 5 (or more ?) times faster than the others is something that should make the webmasters think about “conditional GET” support.