Hi, after some browsing around in the code, I've found a major bottleneck: the current internal link resolution system. If you have a local Wikipedia install, try it for yourself: Visit a few very link heavy pages, like [[List of reference tables]]. You will notice that the rendering speed depends directly on the number of internal links (not on the actual text size, or formatting tags). The link cache seems to work as page rendering gets faster as you load a page repeatedly, but it remains rather slow for link-heavy pages. For further proof, edit OutputPage.php and in the function replaceInternalLinks.php just add a return $s at the top. As a result, internal links will no longer be resolved. Now browse a page (optimally open Main Page before the change and follow links from there after it) and notice that the rendering is lightning fast. The internal link resolution process is quite complex. I notice that lots of Title objects are created, and we have lots of ID lookups. I won't speculate too much about the cause until I have had time to examine them closer. But that this is a bottleneck is certain. I believe we need to make use of the links and brokenlinks table for the actual page rendering. Right now they seem to be used only for the special pages. Regards, Erik -- FOKUS - Fraunhofer Insitute for Open Communication Systems Project BerliOS - http://www.berlios.de