You Probably Don’t Need ETag
Tuesday, March 3rd, 2009(updated 3/4 to include the “Serving from clusters” case)
As I see more server scripts implementing conditional GET (a good thing), I also see the tendency to use a hash of the content for the ETag header value. While this doesn’t break anything, this often needlessly reduces performance of the system.
ETag is often misunderstood to function [...]
