2026-07-17 –, S3B
SPy is a Python variant designed for compilation: well-specified, debuggable, and
expressive. It consists of a low-level core which gives control and speed comparable to
C, Rust and Go, and powerful metaprogramming features which make possible to build
high-level zero-cost abstractions. The result is something which is statically typed
and as fast as C, but with the feeling and ease of Python.
This talk is a deep dive into the SPy core ideas: in particular, we will explore the
internals of the language, show how many builtins are implemented in SPy itself, what
"zero cost abstraction" means in practice and some end-to-end example of how high-level
Python code is compiled into a low-level fast executable.
Principal Software Engineer at Anaconda. He is the author of SPy, a core developer of PyScript and PyPy, and one of the founders of the HPy project, which aims to design a better and more modern C API for Python. He loves to write tools from developers for developers, such as Pdb++, fancycompleter and vmprof and he is creator/maintainer/contributor of numerous other open source projects.
He have also been very active in the Python community for years, giving talks at various conferences such as EuroPython, EuroSciPy, PyCon Italia, and many others. He regularly writes on the PyPy blog and on the HPy blog. His main areas of interest are compilers, language implementation, TDD and performance.