I'm a performance/testing tools guy at a larger company. I do internal consulting on many many different types of applications. Because of this I can never get fully aquainted with the different technologies. One of my current projects is a new implementation of IBM's portal server and of course portlets. I'm looking for advice on things to look for or to target in performance testing the application that is specific to it's "portalness".
Does anyone have a short or long list of things to look at for Portal/Portlet performance? Things I am starting to look at are possible fragment caching in the portal and edge caching servers for static content. We are also looking at min/max thread settings and high speed skins where applicable.