Cython VS PyPy

Compare Cython vs PyPy and see what are their differences.

InfluxDB - Power Real-Time Data Analytics at Scale
Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
SaaSHub - Software Alternatives and Reviews
SaaSHub helps you find the best software and product alternatives
Cython PyPy
79 -
8,976 -
1.7% -
9.8 -
3 days ago almost 8 years ago
Apache License 2.0 -
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.


Posts with mentions or reviews of Cython. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2024-04-10.
  • Ask HN: C/C++ developer wanting to learn efficient Python
    4 projects | | 10 Apr 2024
  • Ask HN: Is there a way to use Python statically typed or with any type-checking?
    1 project | | 6 Aug 2023
  • Cython 3.0
    1 project | | 17 Jul 2023
  • How to make a c++ python extension?
    1 project | /r/learnpython | 12 Jun 2023
    The approach that I favour is to use Cython. The nice thing with this approach is that your code is still written as (almost) Python, but so long as you define all required types correctly it will automatically create the C extension for you. Early versions of Cython required using Cython specific typing (Python didn't have type hints when Cython was created), but it can now use Python's type hints.
  • Never again
    4 projects | /r/ProgrammerHumor | 21 May 2023
    and again, everything that was released after using an older version of cython.
  • Codon: Python Compiler
    9 projects | | 8 May 2023
    Just for reference,

    * Nuitka[0] "is a Python compiler written in Python. It's fully compatible with Python 2.6, 2.7, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 3.10, and 3.11."

    * Pypy[1] "is a replacement for CPython" with builtin optimizations such as on the fly JIT compiles.

    * Cython[2] "is an optimising static compiler for both the Python programming language and the extended Cython programming language... makes writing C extensions for Python as easy as Python itself."

    * Numba[3] "is an open source JIT compiler that translates a subset of Python and NumPy code into fast machine code."

    * Pyston[4] "is a performance-optimizing JIT for Python, and is drop-in compatible with ... CPython 3.8.12"






  • Slow Rust Compiler is a Feature, not a Bug.
    1 project | /r/rustjerk | 28 Apr 2023
  • Any faster Python alternatives?
    6 projects | /r/learnprogramming | 12 Apr 2023
    Profile and optimize the hotspots with cython (or whatever the cool kids are using these days... It's been a while.)
  • What exactly is 'JIT'?
    1 project | /r/ProgrammingLanguages | 10 Apr 2023
    JIT essentially means generating machine code for the language on the fly, either during loading of the interpreter (method JIT), or by profiling and optimizing hotspots (tracing JIT). The language itself can be statically or dynamically typed. You could also compile a dynamic language ahead of time, for example, cython.
  • Python executable makers
    2 projects | /r/Python | 26 Mar 2023
    Cython - - embed demo


Posts with mentions or reviews of PyPy. We have used some of these posts to build our list of alternatives and similar projects.

We haven't tracked posts mentioning PyPy yet.
Tracking mentions began in Dec 2020.

What are some alternatives?

When comparing Cython and PyPy you can also consider the following projects:

SWIG - SWIG is a software development tool that connects programs written in C and C++ with a variety of high-level programming languages.


mypyc - Compile type annotated Python to fast C extensions

Pyston - A faster and highly-compatible implementation of the Python programming language.

Stackless Python

dramatiq - A fast and reliable background task processing library for Python 3.

PeachPy - x86-64 assembler embedded in Python

jax - Composable transformations of Python+NumPy programs: differentiate, vectorize, JIT to GPU/TPU, and more