A fast, compliant alternative implementation of Python Download PyPy What is PyPy ? Documentation (external link) On average, PyPy is about 3 times faster than CPython 3.11. We currently
A performance analysis tool for software projects. It shows performance regresions and allows comparing different applications or implementations
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 is, have a look at our What is PyPy? or consult the PyPy website. If you’re interested in trying PyPy out, check out the installation...
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
Keeping a project as ambitious as PyPy requires resources. Sometimes the problems encountered are general, like updating python versions or supporting various c-extensions. Sometimes the problems are
In short: Discover PyPy sponsors and consultants to optimize your Python projects! Baroque Software offers performance consulting since 2007, while Matti Picus, PyPy r... (AI summary)
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
Directory Size Date main/ 106G 2025-07-05 trunk/ py3.11/ 17G 2025-07-06 release-pypy3.11-v7.x/ 990M 2025-07-03 release-pypy2.7-v7.x/ 8G py3.11-rpy-pickle/ 98M 2025-06-15 ordereddict-move-to-first-bug/ 59M 2025-05-29 jit-setarrayitem-variable-index/ 115M 2025-05-19 py3.10/ 36G 2025-03-31...
We are happy to discuss ideas around the PyPy ecosystem. If you are interested in playing with RPython or PyPy, or have a new idea not mentioned here please join us on irc, channel #pypy (irc.libera.chat). If you are unsure, but still think that you can make a valuable contribution to PyPy, dont...
The PyPy team is proud to release version 7.3.20 of PyPy after the previous release on Feb 26, 2025. The release fixes some subtle bugs in ctypes and OrderedDict and makes PyPy3.11 compatible with an upcoming release of Cython. The release includes two different interpreters: PyPy2.7, which is an...
RPython is supported on Windows platforms, starting with Windows 2000. The following text gives some hints about how to translate a interpreter written in RPython, using PyPy as an example. To build pypy-c you need a working python environment, and a C compiler. It is possible to translate with a...
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