On: Cache Them If You Can

[ars]

> The HTTP Archive doesn’t save response bodies so the determination of “identical” is based on the resource having the exact same URL, Last-Modified, ETag, and Content-Length.

I don't like this. Dynamic pages don't usually send any of those headers, so the page will appear identical in his analysis, despite not actually being identical.

[inkel → ars]

Dymanic pages properly programmed could and should send this headers. Also some frameworks and/or proxies manage this for you.

[driverdan → ars]

I bet Steve excluded files that didn't have these 3 headers.