Friday, June 20, 2014

PyPy3 2.3.1 - Fulcrum

We're pleased to announce the first stable release of PyPy3. PyPy3
targets Python 3 (3.2.5) compatibility.

We would like to thank all of the people who donated to the py3k proposal
for supporting the work that went into this.

You can download the PyPy3 2.3.1 release here:


  • The first stable release of PyPy3: support for Python 3!
  • The stdlib has been updated to Python 3.2.5
  • Additional support for the u'unicode' syntax (PEP 414) from Python 3.3
  • Updates from the default branch, such as incremental GC and various JIT
  • Resolved some notable JIT performance regressions from PyPy2:
  • Re-enabled the previously disabled collection (list/dict/set) strategies
  • Resolved performance of iteration over range objects
  • Resolved handling of Python 3's exception __context__ unnecessarily forcing
    frame object overhead

What is PyPy?

PyPy is a very compliant Python interpreter, almost a drop-in replacement for
CPython 2.7.6 or 3.2.5. It's fast due to its integrated tracing JIT compiler.

This release supports x86 machines running Linux 32/64, Mac OS X 64, Windows,
and OpenBSD,
as well as newer ARM hardware (ARMv6 or ARMv7, with VFPv3) running Linux.

While we support 32 bit python on Windows, work on the native Windows 64
bit python is still stalling, we would welcome a volunteer
to handle that.

How to use PyPy?

We suggest using PyPy from a virtualenv. Once you have a virtualenv
installed, you can follow instructions from pypy documentation on how
to proceed. This document also covers other installation schemes.

the PyPy team


Omer Katz said...

Can we get some benchmarks much like we have for PyPY and CPython 2.7?

Armin Rigo said...

As far as I know, a majority of the benchmarks we use have never been ported to Python 3. So it's far more complicated than just push a switch.

jusic said...

Awesome, congrats on the new release! Finally some stable PyPy goodness for Python 3 as well :)

Anonymous said...

Woo! This is exciting! (Now we just need to upgrade to 3.4... : ) )

geerk said...

Glad to hear that PyPy is now for python 3. Great work!

ArneBab said...

This is great!

Now I can finally test PyPy on some code for which I wanted to test it for years!

(backporting to py2 was too painful)

Thank you very much!