Rob Caron posted the following the other day, and I've copied it below.  If you want to learn more about how we cache versions of files to speed up downloads, including get, view, diff, and more, you'll want to take a look at this.

Team Foundation Server Proxy Screencasts

We just posted a series of six screencasts by Swamy Subramanian, a developer on Team System, that go into great detail about the inner workings and configuration of Team Foundation Server Proxy. 

  • Overview
  • Installation
  • Configuration
  • Cache Management
  • Request Processing
  • Dogfooding Experience

TeamFoundationServerProxyScreencasts.zip