- From: David Woolley <david@djwhome.demon.co.uk>
- Date: Sun, 24 Oct 2004 21:52:49 +0100 (BST)
- To: w3c-wai-ig@w3.org
> statistics are unreliable (as well as generally failing to take into > account proxying systems that check for actual changes before burning > precious bandwidth for the purpose of providing clean statistics)... Another of the bad things that a typical commercial web site does is to try to frustrate caching by adding meta elements that the crib sheets say achieve that effect (although, on a strict reading of the specification, they probably wouldn't, and proxy caches generally ignore contents, so fail to see them). Even without effective, explicit, anti-cache measures, they generally, unecessarily (or only for ad rotation), generate dynamic pages that lack the cache correlators (including Last-Modified-Date) needed to do compliant caching. On some sites, images are cachable, but the cookies with everything sites probably break that even for images. I suspect David isn't generating any image hits, so he is going to be greatly under-represented, anyway, with 10 to 20 image hits per HTML hit for a normal user.
Received on Monday, 25 October 2004 06:19:32 UTC