Board Thread:Support Requests - Getting Technical/@comment-3271569-20130428132942/@comment-303594-20130428141519

Here's a better idea of how many template calls you're using:

Tabber/Attacks
 * Tabber/Attacks/source (50 times)
 * Damage (20 times)
 * Damage/Alternate
 * Damage/Alternate/filter
 * Template:Damage/filter/2 (twice)
 * Template:Attacks (twice)
 * Template:Attacks
 * Damage/Alternate/e
 * Damage/Alternate/c
 * Damage/Alternate/d
 * Damage/Alternate/a
 * Damage/Alternate/b

That's a total of 3360 template calls that MediaWiki is doing to generate that one template. Every time there's a template call, it needs to be looked up from the database, and processed like a page would. That's way too many things for it to be doing in a reasonable time, which is why you're getting the very slow page load (whilst it tries to do the calculation) and then the timeout (when it gives up).