Are you sure it's building everything?
If you think about it, for example:

Say you add a site to the bottom of your directory tree.
You would have to rebuild the categories which this category is a part of.

If you add a site to:
Home->Sports->Baseball->Stats

You would have to rebuild all of those above categories.
And on top of that, the New and Cool pages have to be
updated.

Also if a link has any additional HITS from the last build
that link and its category must be built again.



Robert Blackstone
Webmaster of Scato Search
http://www.scato.com