Sends HTTP Etag to better use the browser cache.http://en.wikipedia.org/wiki/HTTP_ETag
An ETag (entity tag) is an HTTP response header returned by an HTTP/1.1 compliant web server used to determine change in content at a given URL. When a new HTTP response contains the same ETag as an older HTTP response, the contents are considered to be the same without further downloading. The header is useful for intermediary devices that perform caching, as well as for client web browsers that cache results.
By using the Etag, the browser know if to reload the data from server or use cached data. As soon as the remote data is changed, the browser cache will be updated.
Compared to the regular caching, this extension still re-generates the whole page, but it might not be sent to the client. This means it also works with signed in members and it lowers your bandwith usage. It does however not improve the speed of your system and you might still wand to use regular caching for static sites. |
