A short note for visibility. PyPy builds tarballs of the python interpreter ready for download. These include the latest releases and also nightly builds, fresh from our fleet of buildbots. Over the next couple of days, the nightly builds o…
The https://speed.pypy.org site has been running the PyPy benchmark suite since 2010. Our first benchmarking machine was called tannit, and it faithfully ran the suite from May 2010 to Dec 2016. For a brief period in the middle we had a mac…
The PyPy team is proud to release version 7.3.23 of PyPy after the previous release on April 26, 2026. This is a bug-fix release that fixes an overeager warning about unused coroutines, and some problems around multiple inheritance in c-ext…
Here are some ideas to help PyPy move forward: use pypy for your projects and provide detailed feedback talk to us about how to support Python 3.x write blog posts or tweets about your experiences donate some money to enable others to help
This is a cross-post from Max Bernstein from his blog where he writes about programming languages, compilers, optimizations, virtual machines. A long, long time ago (two years!) CF Bolz-Tereick and I made a video about load/store forwarding…
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
Recently I had a lot of fun playing with the Prospero Challenge by Matt Keeter. The challenge is to render a 1024x1024 image of a quote from The Tempest by Shakespeare. The input is a mathematical formula with 7866 operations, which is eval…
There are many time-based statistical profilers around (like VMProf or py-spy just to name a few). They allow the user to pick a trade-off between profiling precision and runtime overhead. On the other hand there are memory profilers such a…
The PyPy team is proud to release version 7.3.18 of PyPy. This release includes a python 3.11 interpreter. We are labelling it "beta" because it is the first one. In the next release we will drop 3.10 and remove the "beta" label. There are
This post started as a quick note summarizing a recent experiment I carried out upon a small RPython interpreter by rewriting it in an uncommon style. It is written for folks who have already written some RPython and want to take a deeper l…
As is probably apparent from the sequence of blog posts about the topic in the last year, I have been thinking about and working on integer optimizations in the JIT compiler a lot. This work was mainly motivated by Pydrofoil, where integer
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 specific and require precise solutions t…