ChrisHilditch

Speed up page load by loading in a widgets area with AJAX.
This plugin creates a new ‘Ajax Widget Area’. The widget loads the widgets placed in the ‘Ajax Widget Area’ with AJAX, after the page has loaded.

Ajax Widget Area

This plugin creates a new 'Ajax Widget Area'. The widget loads the widgets placed in the Area with AJAX, after the page load.

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.

Ajax Widget Area vs Automatic DNS Prefetch