I have many small images that appear in the user profile, and loading this page is terrible. The best solution is to ask them all, but unfortunately I have too many images for this, and only a few hundred are used for each profile.
So, I am trying to get the second best solution. What headlines should I send? ETag? Expire? Cache control Right now I have:
http://metaward.com/media/award/ofwjh3.png
Last-Modified Sat, 11 Jul 2009 22:37:49 GMT
Cache-Control max-age=2592000
Expires Tue, 29 Sep 2009 22:41:21 GMT
And an example of a page with a lot of images (to show how slowly they load, even when cached):
http://metaward.com/6
Sometimes the user also changes his profile, but there is only one of them, so I'm not so worried about caching.