PyPy (with JIT) benchmark times normalized to CPython. Smaller is better. Based on the geometric average of all benchmarks "... we are avid fans of PyPy and commensurately thankful for the great …

6 days ago · Welcome to PyPy’s documentation! Welcome to the documentation for PyPy, a fast, compliant alternative implementation of the Python language. If you want to find out more about what …

PyPy's sandboxing is a working prototype for the idea of running untrusted user programs. Unlike other sandboxing approaches for Python, PyPy's does not try to limit language features considered …

We provide pre-compiled binaries for many platforms and OSes. Note Our nightly binary builds have the most recent bugfixes and performance improvements, though they can be less stable than the offici

6 days ago · What is PyPy? Historically, PyPy has been used to mean two things. The first is the RPython translation toolchain for generating interpreters for dynamic programming languages. And …

6 days ago · What is PyPy? PyPy is a reimplementation of Python in Python, using the RPython translation toolchain. PyPy tries to find new answers about ease of creation, flexibility, maintainability …

6 days ago · Downloading and Installing PyPy Just like CPython, you need a base interpreter environment and then can install extra packages. The choices for installing the base interpreter are: …

Mar 29, 2026 · Modules in PyPy Modules visible from application programs are imported from interpreter or application level files. PyPy reuses almost all python modules of CPython’s standard library, …

Mar 23, 2026 · PyPy v7.3.21: release of python 2.7, 3.11 The PyPy team is proud to release version 7.3.21 of PyPy after the previous release on July 4, 2025. This is a bug-fix release that also updates …

The goal of this page is to point out some of the differences between running python with PyPy and with CPython TL;DR Pure python code works, but there are a few differences with object lifetime mana