WP Speed of Light first layer of optimization is applied to WordPress, from WordPress just using the plugin configuration.
Full optimization features are:

• Statisk fil cache system
• Gzip-datakomprimering
• Browser-cache
• Files group: CSS, JS, Local fonts, Google Fonts
• Ressource-minimering: HTML, CSS, JS
• Specifik mobil cache per enhed
• Fjern forespørgselsstreng
• Automatisk cache-rensning: efter interval, ved gemning, efter brugergruppe
• Database Cleanup
• Cache Preloading and DNS Prefetching

The use of CDN (Content Delivery Network) has been proven to be efficient especially if you have an international audience. A CDN integration is available with all the major CDN on the market like Cloudflare, Amazon Cloudfront, MaxCDN, KeyCDN and others.

The optimization of a website is also about testing the performance to determine what elements can be optimized to yield performance. With WP Speed of Light you can run several tests on the same page and open a comparison table. We've made an integration with WebPageTest API to run detailed speed tests on various elements like:

• Første indlæsningstid
• Anden indlæsningstid
• Første byte-tid
• Tid til at starte gengivelse
• Elementer leveret fra cache i %
• Elementer komprimeret med Gzip i %
• Procentdel af komprimerede billeder

If the cache have been served using WP Speed of Light, you got a green symbol, if not it's grey, as simple as that! Furthermore, you can determine wether the desktop, tablet or mobile cache is served. JoomUnited cache checker also displays general information (apply to all websites): 

• Samlet sidelæsningstid
• Varnish-servercache
• When the Varnish cache have been generated (current or previous request)
• Detaljer om indlæsningstiden efter element: Vent på browsersvar, Omdirigering (hvis nogen), DNS-opløsning, Forbind til server
• Details of the loading time by element: Content sending, Reveive, Unload time, Dom time, Load time