2010/11/4 Magnus Manske magnusmanske@googlemail.com:
Though Wikimedia servers are quite efficient already, it might be worth checking this out:
http://code.google.com/intl/de/speed/page-speed/docs/module.html
You can have an automated program attempt to use the best practices mentioned there to optimize your site, or you can have humans implement those optimizations in MediaWiki. The latter is exactly what ResourceLoader is doing.
Roan Kattouw (Catrope)