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DNS Prefetching: Loading the DNS of the domains needed before they are required
01-29-2013, 06:11 AM
Post: #5
RE: DNS Prefetching: Loading the DNS of the domains needed before they are required
Yes, Firefox, Chrome and IE9+ are all quite good at parsing the HTML itself and finding any domains referenced on the page and adding an explicit header won't really give them any more info. For things like ads that may go through 3-4 different domains or content that is injected by javascript they can't see in the preload scanner then you would basically be telling the browser about those domains.

I don't provide any special hints on my site though I'm also not doing things like url-encoding small images, etc. I try to go for the best ROI on my time and some of those micro-optimizations aren't worth the dev effort (maybe when nginx pagespeed is beta I might try having some of those automated).
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RE: DNS Prefetching: Loading the DNS of the domains needed before they are required - pmeenan - 01-29-2013 06:11 AM

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