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Oct 23, 2012 · Okay, to this day no implementation except CPython actually implements those versions of the language. But that will change (PyPy is catching up). To answer the question you meant to ask: CPython, 3.x or otherwise, does not, never did, and likely never will, contain a JIT compiler.
- A note on development
- FAQ
- Code of Conduct
Development has moved to https://github.com/tonybaloney/Pyjion
What are the goals of this project?
There are three goals for this project. 1.Add a C API to CPython for plugging in a JIT 2.Develop a JIT module using CoreCLR utilizing the C API mentioned in goal #1 3.Develop a C++ framework that any JIT targeting the API in goal #1 can use to make development easier Goal #1 is to make it so that CPython can have a JIT plugged in as desired (CPython is the Python implementation you download from https://www.python.org/). That would allow for an ecosystem of JIT implementations for Python where users can choose the JIT that works best for their use-case. And by using CPython we hope to have compatibility with all code that it can run (both Python code as well as C extension modules). Goal #2 is to develop a JIT for CPython using the JIT provided by the CoreCLR. It's cross-platform, liberally licensed, and the original creator of Pyjion has a lot of experience with it. Goal #3 is to abstract out all of the common bits required to write a JIT implementation for CPython. The idea is to create a framework where JIT implementations only have to worry about JIT-specific stuff like how to do addition and not when to do addition.
How do you pronounce "Pyjion"?
Like the word "pigeon". @DinoV wanted a name that had something with "Python" -- the "Py" part -- and something with "JIT" -- the "JI" part -- and have it be pronounceable.
Are you going to support OS X and/or Linux?
Yes! Goals #1 and #3 are entirely platform-agnostic while goal #2 of using CoreCLR as a JIT compiler is not an impedence to supporting OS X or Linux as it already supports the major OSs. The only reason Pyjion doesn't directly support Linux or OS X is entirely momentum/laziness: since the work is being driven by Microsoft employees, it simply meant it was easier to get going on Windows.
This project has adopted the Microsoft Open Source Code of Conduct. For more information see the Code of Conduct FAQ or contact opencode@microsoft.com with any additional questions or comments.
Jan 28, 2022 · This week on the show, we have Real Python author and previous guest Anthony Shaw to talk about his project Pyjion, a drop-in JIT compiler for CPython 3.10. Episode Sponsor: Anthony has been working on Pyjion over the past year and recently released version 1.0.
Jan 9, 2024 · This new JIT is an optional optimizer for this new architecture. I assume that it will be the default in future versions once the major bugs have been squashed. When you compile CPython from source, you can provide a flag --enable-experimental-jit to the configure script. This will generate machine-code templates for the Python bytecodes.
To expand on previous replies a little, a JIT would have to do a lot of work checking for attributes, types, etc, due to the dynamic nature of python. Smart move is to call functions in a support library to do that. But that's exactly what the cpython interpreter is already doing, so a JIT won't speed things up all that much for standard python.
Apr 12, 2024 · PEP 744 is an informational PEP answering many common questions about CPython 3.13’s new experimental JIT compiler. My main goal for this PEP is to build community consensus around the specific criteria that the JIT should meet in order to become a permanent, non-experimental part of CPython. The “Specification” section lists three basic requirements as a starting point, but I expect ...
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What are the goals of CPython JIT?
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What is a JIT in Python?
Should CPython be included in a full JIT?
Does CPython have a JIT compiler?
Does Python meet JIT compilers?
Pyjion is a JIT compiler. It compiles native CPython bytecode into machine code. Without Pyjion, CPython uses a master evaluation loop (called the frame evaluation loop) to iterate over opcodes The Pyjion compiler has 3 main stages:
