One of the best ways to get the top performance out of SilverStripe is to bypass it completely. This saves on any loading time, connecting to the database and formatting your templates. This is only appropriate approach on web pages that have completely static content.
By publishing the page as HTML it's possible to run SilverStripe from behind a corporate firewall, on a low performance server or serve millions of hits an hour without expensive hardware.
This functionality is available through the StaticPublisher module. The module provides hooks for developers to generate static HTML files for the whole application or publish key pages (e.g a web applications home page) as HTML to reduce load on the server.