cross-host benchmarking with wordpress

Afaik there’s no real performance test available (what exactly do you want to check?), but you can find a plugin that came out of the first Q below, that might help you doing some profilling.

An interesting read might be…

1. refactoring WP to improve memory performance
2. generally a lot of Qs inside the performance tag

Also: You can use the Debug Bar Plugin:

_{(source: wordpress.org)}

…or if it’s about plugin performance, try to take a look via the P3 Plugin Performance Profiler Plugin. No need to run this on multiple sites, as it meassures in %-values.