After considerable development, many hardware swaps, sleep deprivation, and an abnormally large power bill for the month, I'm pleased to announce that benchmarks are now live on PCPartPicker.
The initial set is not complete, but I feel like it is a large enough sampling of hardware for people to get an idea of what it will become. As time progresses, I will be incorporating more hardware and adding more results. I will also be expanding the set of benchmarks to be run as well. I wanted more to be available, but at a certain point you just have to stop and ship it.
In addition to providing tables of benchmark data, you can also get relevant benchmark information based on your particular part list (if available). When you configure a part list, a "Benchmarks" tab will appear next to the "Prices By Merchant". If you click on this tab, it'll show you benchmark results that are available and relevant to parts you've picked out. However, as my hardware pool is somewhat limited right now, it may not show many (if any) results… for now.
I hope you find it useful. Please let me know if you have any feedback or bug reports.