Hello!
I've recently rewritten my web based MediaWiki benchmark tool.
You'll find it online at http://fannon.de/p/mediawiki-benchmark/ The Sources at GitHub: https://github.com/Fannon/MediaWiki-Benchmarker
It's a simple tool that allows to benchmark MediaWiki Installations through the API. It is now possible to add / append new benchmarks, so it's easy to compare different settings or envirionments - not only pages.
The resulting data can be downloaded as CSV and JSON, the charts as SVG vector graphics.
Hope you like it! Simon