08-21-2013, 09:56 PM
Hi Pat,
Firefox offers DNS prefetching since FF3.5:
https://developer.mozilla.org/en-US/docs...refetching
As a matter of fact the DNS for all links in the source code should be automatically prefetched.
Please have a look at the test detail of http://www.finanznachrichten.de in this report: http://www.webpagetest.org/result/130821...1/details/
There are 44 ms for a DNS lookup for http://fns1.de or 4 ms for a DNS lookup for http://js.revsci.net or 39 ms for http://www.google-analytics.com ... although these should be prefetched automatically according to the info on the Mozilla website.
So, the question is now:
Does the DNS prefetching of FF work and as a matter of fact there are no (additional) DNS lookup times or where do these times come from?
Firefox offers DNS prefetching since FF3.5:
https://developer.mozilla.org/en-US/docs...refetching
As a matter of fact the DNS for all links in the source code should be automatically prefetched.
Please have a look at the test detail of http://www.finanznachrichten.de in this report: http://www.webpagetest.org/result/130821...1/details/
There are 44 ms for a DNS lookup for http://fns1.de or 4 ms for a DNS lookup for http://js.revsci.net or 39 ms for http://www.google-analytics.com ... although these should be prefetched automatically according to the info on the Mozilla website.
So, the question is now:
Does the DNS prefetching of FF work and as a matter of fact there are no (additional) DNS lookup times or where do these times come from?