I got caching of the navigation stuff working nicely. It isn't as efficient as it could be because it constructs the "tree" for every URL, but at least it doesn't re-render for the same URL thanks to caching.

The nav_tree in general is not very efficient, and the sooner it gets rewritten, the better. This one is from Alan Runyan (runyaga) <tal:checkperms tal:define="global checkPermission nocall:here/portal_membership/checkPermission; global wtool nocall:here/portal_workflow;"> <metal:portlet use-macro="here/portlet_navigation/macros/portlet" /> </tal:checkperms>

Here is another question for you. I notice in my profiling that two things are just killing me. They are:

here/getAllowedTypes portal.list_filtered_actions(here)

I have associated both of these with a RamCache that is not very restrictive (in terms of REQUEST contents, i.e. AUTHENTICATED_USER, URL1) and yet they never get cached. Any idea why? They are python scripts (in case that matters). Any more clever ideas?

No, I don't know why they aren't getting cached. Maybe one of the caching gurus on the list can answer that one. Nate