I am testing XOOPS leatest with newBB 2.0.2 in localhost.
All modules takes reasonable time to load.
But newBB acts a bit different. When I click any forum under forum index, it takes longer time to load. Sometimes "The page cannot be displayed"(after refresh page is shown again).

What could be the reason? Can I do anything to improve this load performance?
[any forum article link is also appreciated]

I found 2.0 RC3 slow, but performance was great in 2.0.1 and still is great in my 2.0.2. I HAVE turned off a lot of un-needed clutter from the forum, and turned off PNG transparency, using GIFs by default (not auto). It's on a DSL line, have a look , any quicker than yours?

The penny has just dropped. I get a similar problem to you. From OUTSIDE the site, it's quicker. I think this is because your browser is loading the site, at the same time Apache and PHP is trying to compile it.

Looking at the CPU usage, mine computer can lock up for up to 4 seconds. This isn't the case when I browsing from another computer, either on the local network or outside the network.