Common Prefetch Links

DNS prefetching

<!-- Amazon S3 -->
<link rel="dns-prefetch" href="//s3.amazonaws.com">

<!-- Google CDN -->
<link rel="dns-prefetch" href="//ajax.googleapis.com">

<!-- Microsoft CDN -->
<link rel="dns-prefetch" href="//ajax.microsoft.com">
<link rel="dns-prefetch" href="//ajax.aspnetcdn.com">

<!-- CDN JS -->
<link rel="dns-prefetch" href="//cdnjs.cloudflare.com">

<!-- Bootstrap CDN -->
<link rel="dns-prefetch" href="//netdna.bootstrapcdn.com">

<!-- Google Tag Manager -->
<link rel="dns-prefetch" href="//www.googletagmanager.com">

<!-- Google Analytics -->
<link rel="dns-prefetch" href="//www.google-analytics.com">

<!-- Google Fonts -->
<link rel="dns-prefetch" href="//fonts.googleapis.com">

<!-- Facebook -->
<link rel="dns-prefetch" href="//connect.facebook.net">

<!-- Google+ -->
<link rel="dns-prefetch" href="//apis.google.com">

<!-- Linkedin -->
<link rel="dns-prefetch" href="//platform.linkedin.com">

<!-- Twitter -->
<link rel="dns-prefetch" href="//platform.twitter.com">