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        "author": "Nir Soffer",
        "author_email": "nsoffer@redhat.com",
        "bugtrack_url": null,
        "classifiers": [
            "Development Status :: 4 - Beta",
            "Intended Audience :: Developers",
            "License :: OSI Approved :: GNU General Public License v2 or later (GPLv2+)",
            "Operating System :: POSIX :: Linux",
            "Programming Language :: C",
            "Programming Language :: Python :: 2.6",
            "Programming Language :: Python :: 2.7",
            "Programming Language :: Python :: Implementation :: CPython",
            "Topic :: Software Development :: Libraries"
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        "description": "==========\r\ncthreading\r\n==========\r\n\r\ncthreading implements Python 2 Lock, RLock, and Condition in C, speeding\r\nup threads synchronization and decreasing cpu usage.\r\n\r\nStatus: |travis|\r\n\r\n.. |travis| image:: https://travis-ci.org/nirs/cthreading.svg?branch=master\r\n    :alt: Travis-CI Build Status\r\n    :target: https://travis-ci.org/nirs/cthreading\r\n\r\n\r\nPerformance\r\n===========\r\n\r\ncthreading eliminates the overhead of `threading.RLock` and\r\n`threading.Condition` which are implemented in pure Python in Python 2.\r\nIn particular, `threading.Condition` is implemented using polling. In\r\nPython 3 `threading.Condition` is implemented without polling;\r\ncthreading implements a similar design in C.\r\n\r\n.. code-block::\r\n\r\n    $ time python whispers.py -m cthreading\r\n    real    0m2.664s\r\n    user    0m2.965s\r\n    sys     0m0.808s\r\n\r\n    $ time python3 whispers.py\r\n    real    0m9.664s\r\n    user    0m8.949s\r\n    sys     0m1.812s\r\n\r\n    $ time python whispers.py\r\n    real    0m14.914s\r\n    user    0m16.986s\r\n    sys     0m12.690s\r\n\r\n    $ time python whispers.py -m pthreading\r\n    real    0m20.169s\r\n    user    0m23.062s\r\n    sys     0m17.022s\r\n\r\nYour application is unlikely to have similar workload; do not expect\r\nthis improvement.\r\n\r\nFor more info see https://github.com/nirs/cthreading/wiki/performance.\r\n\r\n\r\nUsage\r\n=====\r\n\r\nImport cthreading before any other module and monkeypatch the thread and\r\nthreading modules. From this point, threading.Lock, threading.RLock, and\r\nthreading.Condition are using cthreading.\r\n\r\n.. code-block:: python\r\n\r\n    import cthreading\r\n    cthreading.monkeypatch()\r\n\r\nNote: cthreading will raise RuntimeError if the threading module was\r\nimported before `cthreading.monkeypatch()` is called.\r\n\r\n\r\nTested platforms\r\n================\r\n\r\nx86_64\r\n------\r\n\r\n- Fedora 22 / Python 2.7.10\r\n- RHEL 7.2 / Python 2.7.5\r\n- RHEL 7.2 / Python 2.7.10+ (upstream)\r\n- RHEL 7.1 / Python 2.7.5\r\n- RHEL 6.7 / Python-2.6.6\r\n- Ubuntu 14.04 Server / Python 2.7.6\r\n- Ubuntu 12.04 Server / Python 2.7.3 (python regression tests not available)\r\n- Ubuntu 12.04 / Python 2.6.9 (Travis container)\r\n- Ubuntu 12.04 / Python 2.7.9 (Travis container)\r\n\r\nPOWER8E\r\n-------\r\n\r\n- RHEL 7.2 / Python 2.7.5\r\n- RHEL 7.2 / Python 2.7.10+ (upstream)\r\n\r\n\r\nHacking\r\n=======\r\n\r\nFor rpm based distributions::\r\n\r\n    yum install python-devel python-test\r\n\r\nFor deb based distributions::\r\n\r\n    apt-get install python-dev libpython2.7-testsuite\r\n\r\nInstalling Python packages::\r\n\r\n    pip install pytest pytest-timeout yappi==0.93\r\n\r\nBuilding and running the quick tests::\r\n\r\n    make\r\n\r\nBefore submitting patches, run the Python regression tests suite::\r\n\r\n    make regrtest\r\n\r\nCheck the `Makefile` for more info.\r\n\r\n\r\nSimilar projects\r\n================\r\n\r\n- `pthreading <https://github.com/oVirt/pthreading>`_ - uses\r\n  pthread_mutex and pthread_cond apis directly via ctypes. This\r\n  introduces undefined behavior and actually slower and increases cpu\r\n  usage in most cases compared to the original Python implementation.",
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