This repository is independent of CoreFX and CoreCLR repositories! So this is the only repository you need to clone.
git clone https://github.com/dotnet/performance.git
Python is needed to run the scripts used by automation. These scripts wrap all the logic for tool acquisition, benchmarks build and execution, data collection and upload.
The python scripts in this repository support python version 3.5 or greater.
Used to build the .NET Performance projects, and they can be downloaded here:
Optionally, you could use dotnet.py to to download the DotNet Cli locally.