Stefan M.

The Plugin implements 2 things:
DNS-Prefetch
It looks for all CSS and JS Files which are loaded from external webpages and implement a dns-prefetch header tag. 
This saves a lot of connection time on page load.
HTML5 Prefetch and Google Prerender
It makes a new table with small statistics and measures (internal) referal page to next page. 
With these statistics, the most clicked “next” page will be automatically added as prerender. Prerender opens with very small CPU load the “next” guessed page already as a hidden Tab in the client browser. If the client select this page, the page can instantly showed without delay. 
Tests have shown a pageload decrease of 68%.
Please note: The prerender needs some stats to work correctly. Don’t try to generate some statistic, wait few days / weeks and you have organic and true statistic.
If you have questions, please do not hesitate to contact us: <a href="http://wuk.ch/" title="web updates kmu GmbH" rel="nofollow ugc">wuk.ch</a>

wuk.ch DNS-Prefetch / Prerender

Adds dns-prefetch and prerender functionalities on WordPress for better PageSpeed.

mabujo

Modern browsers allow pages to prefetch DNS records of external libraries. This plugin looks through WordPress enqueued scripts and styles and adds DNS prefetch statements for scripts and stylesheets added by other plugins.
This means that when the browser comes to download an external script or stylesheet, it already has looked up the DNS record for the external domain, and can proceed immediately to downloading the script, saving latency during loading of external resources.
You can read more about this technique in the <a href="https://www.chromium.org/developers/design-documents/dns-prefetching" rel="nofollow ugc">Chromium document</a>.
Plugin page <a href="https://mabujo.com/blog/automatic-dns-prefetch-wordpress-plugin/" rel="nofollow ugc">Automatic DNS Prefetch plugin @ mabujo</a>.

Automatic DNS Prefetch

Works as advertised

This plugin speeds up your page load speed by adding DNS prefetch statements for external libraries.

wuk.ch DNS-Prefetch / Prerender vs Automatic DNS Prefetch