I'm trying to gather some benchmarking data to determine how well my optimizations to WordPress are fairing. I've found this page on High Traffic Tips but it doesn't contain any data. Are there any tools that benchmark WordPress? Not just how well it holds up against traffic, but things like how caching fairs when you're performing X Posts an hour and X comments a minute as well as other normal use cases for WordPress.
For the record, I've run Siege and Blitz.io against installations, but that's merely how well your site can cache and serve/spread the requests around. If that's the only the only measurement that can be consistently produced (maybe req/s is the only way to go) then that's fine. If there are other tools that can show how many req/s can be sustained over varying usage (have to regenerate the cache ever 10 mins will have a big impact if it's serve while refreshing, or clear out cache then refresh cache).