PyPy is an alternative implementation of the Python language. PyPy’s C API compatibility layer has some performance issues. Carl Friedrich Bolz-Tereick and I are working on a way to make PyPy’s C API interactions much faster. It’s looking very promising. Here’s a sketch of how it works. The C API as lingua franca Python is pretty widely-used. For years, CPython was the only implementation, and CPython was not designed to be fast. The Python community needed some programs to go faster and determi...