By making the Cinder project publicly available, the company wants to open conversation about upstreaming its performance optimizations to standard Python.

Cinder is Meta's performance-oriented version of Python that allows Instagram to run at global scale, while Pyre is a performant type-checker used by thousands of Python developers in Meta.

In the first half of 2020, Pysa detected 44% of all security bugs in Instagram's server-side Python code.