Via JP’s codepoetry:
Doing web development on my local machine – a Vista box – I was wondering why page rendering was so slow. First I thought my web application was not well done. But then I figured out that the pages rendered lightning fast on IE 7. And again later, I experienced, that the web application rendered pretty fast even in Firefox, when published to the live server.
Doing some research I found this blog entry, which was quite helpful.
The change of the Firefox setting network.dns.disableIPv6 to true did the trick.
Screenshot and more in Jörn’s blog.