"Performance is usually top-of-mind for any web site deployment, including MOSS.  If you're writing code that deals with SharePoint items, and you're deploying that code to a site with even moderate traffic, you should consider using the PortalSiteMapProvider for increased performance.  In this post, Chris Richard takes us through the feature and describes how it can be leveraged.  Take it away Chris!"

A great post at "Microsoft Enterprise Content Management (ECM) Team Blog"

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