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1. stackoverflow.com › questions › 18946662Why shouldn't I use PyPy over CPython if PyPy is 6.3 times ...

   stackoverflow.com › questions › 18946662

   Sep 23, 2013 · A: PyPy isn't 100% compatible with CPython because it isn't simulating CPython under the hood. Some programs may still depend on CPython's unique features that are absent in PyPy such as C bindings, C implementations of Python object&methods, or the incremental nature of CPython's garbage collector.

2. pypy.org › compatPython compatibility - PyPy

   pypy.org › compat

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   The main difference in pure-python code that is not going to be fixed is that PyPy does not support refcounting semantics for "automatically" releasing state when an object's __del__ is called. The following code won't fill the file immediately, but only after a certain period of time, when the GC does a collection and flushes the output, since the file is only closed when the __del__ method ...

3. doc.pypy.org › en › latestFrequently Asked Questions — PyPy documentation

   doc.pypy.org › en › latest

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   3 days ago · This includes subtle decisions about whether some effects are ok or not for the user (i.e. the Python programmer). CPython has additionally the problem (1) of reference counting. With PyPy, this sub-problem is simpler: we need to make our GC multithread-aware. This is easier to do efficiently in PyPy than in CPython.

4. en.wikipedia.org › wiki › PyPyPyPy - Wikipedia

   en.wikipedia.org › wiki › PyPy

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   It is tested nightly on Windows, Linux, OpenBSD and Mac OS X. PyPy is able to run pure Python software that does not rely on implementation-specific features. [15] There is a compatibility layer for CPython C API extensions called CPyExt, but it is incomplete and experimental. The preferred way of interfacing with C shared libraries is through ...

5. doc.pypy.org › en › latestDifferences between PyPy and CPython

   doc.pypy.org › en › latest

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   On CPython 2.6 and 2.7 it works in a bit more cases, which are not supported by PyPy so far. (If needed, it could be supported, but then it will likely work in many more case on PyPy than on CPython 2.6/2.7.) In PyPy 3, __class__ attribute assignment between heaptypes and non heaptypes.

6. www.digitalocean.com › getting-started-with-pypyGetting Started with PyPy - DigitalOcean

   www.digitalocean.com › getting-started-with-pypy

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   Oct 10, 2024 · “Compliant” means that PyPy is compatible with CPython, as you can use nearly all CPython syntax in PyPy. There are some compatibility differences, as mentioned here. The most powerful advantage of PyPy is its speed. PyPy is much faster than CPython; we’ll see tests later on where PyPy performs about 7 times faster.

7. People also ask

   Why is PyPy not compatible with CPython?

   • A: PyPy isn't 100% compatible with CPython because it isn't simulating CPython under the hood. Some programs may still depend on CPython's unique features that are absent in PyPy such as C bindings, C implementations of Python object&methods, or the incremental nature of CPython's garbage collector.

   Why shouldn't I use PyPy over CPython if PyPy is 6.3 times faster?

   stackoverflow.com/questions/18946662/why-shouldnt-i-use-pypy-over-cpython-if-pypy-is-6-3-times-faster

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   Does PyPy run on CPython?

   • PyPy is written in Restricted Python. It does not run on top of the CPython interpreter, as far as I know. Restricted Python is a subset of the Python language. AFAIK, the PyPy interpreter is compiled to machine code, so when installed it does not utilize a python interpreter at runtime.

   PyPy -- How can it possibly beat CPython? - Stack Overflow

   stackoverflow.com/questions/2591879/pypy-how-can-it-possibly-beat-cpython

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   Is PyPy 3.8+ compatible with Windows PyPy?

   • Windows PyPy3.5 v6.0, the latest as of December 2018, is in beta. To cite the Zen of Python: Readability counts. For example, Python 3.8 introduced fstring =. There might be other features in Python 3.8+ which are more important to you. PyPy does not support Python 3.8+ at the moment.

   Why shouldn't I use PyPy over CPython if PyPy is 6.3 times faster?

   stackoverflow.com/questions/18946662/why-shouldnt-i-use-pypy-over-cpython-if-pypy-is-6-3-times-faster

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   Does PyPy run faster than CPython?

   • PyPy (/ ˈpaɪpaɪ /) is an implementation of the Python programming language. PyPy often runs faster than the standard implementation CPython because PyPy uses a just-in-time compiler. Most Python code runs well on PyPy except for code that depends on CPython extensions, which either does not work or incurs some overhead when run in PyPy.

   PyPy - Wikipedia

   en.wikipedia.org/wiki/PyPy

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   Can I use CPython C API with PyPy?

   • Modules that use the CPython C API will probably work, but will not achieve a speedup via the JIT. We encourage library authors to use CFFI and HPy instead. If you are looking for how to use PyPy with the scientific python ecosystem, we encourage you to use conda, since they repackage common libraries like scikit-learn and SciPy for PyPy.

   Python compatibility - PyPy

   pypy.org/compat.html

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   Could PyPy be merged into CPython?

   • PyPy is not a fork of CPython, so it could never be merged directly into CPython. Theoretically the Python community could universally adopt PyPy, PyPy could be made the reference implementation, and CPython could be discontinued. However, PyPy has its own weaknesses:

   Why wasn't PyPy included in standard Python? - Stack Overflow

   stackoverflow.com/questions/12867263/why-wasnt-pypy-included-in-standard-python

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8. python.plainenglish.io › cpython-vs-pypy-7443aa12879dCPython vs PyPy. The Python world is a bizarre thing… | by ...

   python.plainenglish.io › cpython-vs-pypy-7443aa12879d

   Mar 16, 2024 · Compatibility: CPython offers broad compatibility with Python libraries and C extensions, making it a safe choice for most projects. PyPy has made great strides in compatibility but may still encounter issues with some C extensions. Development Focus: CPython focuses on stability, readability, and compatibility.