If you still need help, visit our Sitefinity consulting page and book in a consultant.
Sitefinity uses caching heavily so ensure debug="false" when deploying to non-development environments.
If you are working with Sitefinity, then use Sitefinity Thunder.
In Sitefinity you can alter the appearance and content areas on your webpage using "Layouts". These layouts are basically just Divs with sizes applied.
Initial Sitefinity load times are quite bad. On a live site you can do things like keeping the site warm though IIS however for developers this process takes quite a bit of time.
If you need to create a custom CDN library provider... Sitefinity manages images, videos, and content on a file system which the website uses. For larger sites, CDN providers are used for all content that doesn’t need to be on the servers.