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atomicl-0.1.1
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Yet another implementation of AtomicLong
| ویژگی | مقدار |
|---|---|
| سیستم عامل | - |
| نام فایل | atomicl-0.1.1 |
| نام | atomicl |
| نسخه کتابخانه | 0.1.1 |
| نگهدارنده | [] |
| ایمیل نگهدارنده | [] |
| نویسنده | Alex Khomchenko |
| ایمیل نویسنده | akhomchenko@gmail.com |
| آدرس صفحه اصلی | https://github.com/gagoman/atomicl |
| آدرس اینترنتی | https://pypi.org/project/atomicl/ |
| مجوز | MIT |
=======
atomicl
=======
.. image:: https://travis-ci.org/gagoman/atomicl.svg?branch=master
:target: https://travis-ci.org/gagoman/atomicl
:alt: CI Status
.. image:: https://img.shields.io/pypi/v/atomicl.svg
:target: https://pypi.org/project/atomicl/#history
:alt: Latest released version
.. image:: https://img.shields.io/pypi/pyversions/atomicl.svg
:target: https://pypi.org/project/atomicl
:alt: Supported Python versions
Yet another implementation of AtomicLong class.
Introduction
------------
Class that allows to update long value atomically.
Highly inspired by Java's AtomicLong_ class and atomic_ package.
The most of performance is gained by using Cython_ with the
pure Python fallback available *(you do not want to use it)*.
Examples::
>> counter = atomicl.AtomicLong()
>> counter += 2
>> counter.value
2
>> counter.get_and_set(5)
2
>> counter.value
5
Differences from atomic_
------------------------
``atomic`` is a more mature library and is battle-tested.
Despite small API differences, the huge difference between ``atomic``
and ``atomicl`` is comparisons operations support. ``atomicl`` does
not supports comparison and, for now, I do not see reasons to have
it. I tend to agree with folks from java on
`this topic <https://stackoverflow.com/questions/7567502/why-are-two-atomicintegers-never-equal>`_.
``atomic`` is backed by CFFI_ which makes it a good choice for ``CPython``
and ``PyPy``. ``atomicl`` with ``Cython`` extension gains better
performance on ``CPython`` and performs worse on ``PyPy``. See
Benchmarks_ for more details.
Benchmarks
----------
Results for benchmarks.py_ on OS X ``10.13.5`` with
``Intel(R) Core(TM) i5-5257U CPU @ 2.70GHz`` and turbo boost disabled:
``Python 3.7.0``::
# atomic / atomicl (Cython)
ctor_default: Mean +- std dev: [atomic.py37] 1.50 us +- 0.04 us -> [atomicl_cy.py37] 92.3 ns +- 0.9 ns: 16.25x faster (-94%)
ctor: Mean +- std dev: [atomic.py37] 1.40 us +- 0.02 us -> [atomicl_cy.py37] 109 ns +- 1 ns: 12.90x faster (-92%)
increment: Mean +- std dev: [atomic.py37] 515 ns +- 7 ns -> [atomicl_cy.py37] 33.3 ns +- 0.3 ns: 15.43x faster (-94%)
decrement: Mean +- std dev: [atomic.py37] 516 ns +- 6 ns -> [atomicl_cy.py37] 33.3 ns +- 0.2 ns: 15.51x faster (-94%)
setter: Mean +- std dev: [atomic.py37] 1.56 us +- 0.02 us -> [atomicl_cy.py37] 42.0 ns +- 0.6 ns: 37.05x faster (-97%)
cas: Mean +- std dev: [atomic.py37] 1.68 us +- 0.02 us -> [atomicl_cy.py37] 137 ns +- 1 ns: 12.30x faster (-92%)
# atomic / atomicl (Python)
ctor_default: Mean +- std dev: [atomic.py37] 1.50 us +- 0.04 us -> [atomicl_py.py37] 957 ns +- 17 ns: 1.57x faster (-36%)
ctor: Mean +- std dev: [atomic.py37] 1.40 us +- 0.02 us -> [atomicl_py.py37] 902 ns +- 17 ns: 1.56x faster (-36%)
increment: Mean +- std dev: [atomic.py37] 515 ns +- 7 ns -> [atomicl_py.py37] 980 ns +- 60 ns: 1.90x slower (+90%)
decrement: Mean +- std dev: [atomic.py37] 516 ns +- 6 ns -> [atomicl_py.py37] 970 ns +- 26 ns: 1.88x slower (+88%)
setter: Mean +- std dev: [atomic.py37] 1.56 us +- 0.02 us -> [atomicl_py.py37] 413 ns +- 12 ns: 3.77x faster (-73%)
cas: Mean +- std dev: [atomic.py37] 1.68 us +- 0.02 us -> [atomicl_py.py37] 1.03 us +- 0.01 us: 1.64x faster (-39%)
``Python 3.4.6``::
# atomic / atomicl (Cython)
ctor_default: Mean +- std dev: [atomic.py34] 1.64 us +- 0.06 us -> [atomicl_cy.py34] 74.5 ns +- 0.8 ns: 22.03x faster (-95%)
ctor: Mean +- std dev: [atomic.py34] 1.52 us +- 0.03 us -> [atomicl_cy.py34] 90.9 ns +- 1.1 ns: 16.71x faster (-94%)
increment: Mean +- std dev: [atomic.py34] 523 ns +- 20 ns -> [atomicl_cy.py34] 33.3 ns +- 0.3 ns: 15.70x faster (-94%)
decrement: Mean +- std dev: [atomic.py34] 522 ns +- 7 ns -> [atomicl_cy.py34] 33.6 ns +- 0.3 ns: 15.55x faster (-94%)
setter: Mean +- std dev: [atomic.py34] 1.42 us +- 0.04 us -> [atomicl_cy.py34] 44.0 ns +- 1.1 ns: 32.37x faster (-97%)
cas: Mean +- std dev: [atomic.py34] 1.54 us +- 0.03 us -> [atomicl_cy.py34] 118 ns +- 1 ns: 13.05x faster (-92%)
# atomic / atomicl (Python)
ctor_default: Mean +- std dev: [atomic.py34] 1.64 us +- 0.06 us -> [atomicl_py.py34] 982 ns +- 28 ns: 1.67x faster (-40%)
ctor: Mean +- std dev: [atomic.py34] 1.52 us +- 0.03 us -> [atomicl_py.py34] 912 ns +- 24 ns: 1.67x faster (-40%)
increment: Mean +- std dev: [atomic.py34] 523 ns +- 20 ns -> [atomicl_py.py34] 1.09 us +- 0.02 us: 2.09x slower (+109%)
decrement: Mean +- std dev: [atomic.py34] 522 ns +- 7 ns -> [atomicl_py.py34] 1.10 us +- 0.02 us: 2.11x slower (+111%)
setter: Mean +- std dev: [atomic.py34] 1.42 us +- 0.04 us -> [atomicl_py.py34] 456 ns +- 6 ns: 3.12x faster (-68%)
cas: Mean +- std dev: [atomic.py34] 1.54 us +- 0.03 us -> [atomicl_py.py34] 1.04 us +- 0.02 us: 1.48x faster (-33%)
``PyPy 5.8.0-6.0.0``::
# atomic / atomicl (Cython)
ctor_default: Mean +- std dev: [atomic.pypy3] 292 ns +- 7 ns -> [atomicl_cy.pypy3] 1.20 us +- 0.04 us: 4.10x slower (+310%)
ctor: Mean +- std dev: [atomic.pypy3] 270 ns +- 10 ns -> [atomicl_cy.pypy3] 1.13 us +- 0.03 us: 4.19x slower (+319%)
increment: Mean +- std dev: [atomic.pypy3] 27.9 ns +- 0.4 ns -> [atomicl_cy.pypy3] 68.4 ns +- 2.8 ns: 2.45x slower (+145%)
decrement: Mean +- std dev: [atomic.pypy3] 27.7 ns +- 0.1 ns -> [atomicl_cy.pypy3] 67.6 ns +- 1.0 ns: 2.44x slower (+144%)
setter: Mean +- std dev: [atomic.pypy3] 283 ns +- 5 ns -> [atomicl_cy.pypy3] 49.4 ns +- 1.3 ns: 5.73x faster (-83%)
cas: Mean +- std dev: [atomic.pypy3] 289 ns +- 6 ns -> [atomicl_cy.pypy3] 142 ns +- 7 ns: 2.03x faster (-51%)
# atomic / atomicl (Python)
ctor_default: Mean +- std dev: [atomic.pypy3] 292 ns +- 7 ns -> [atomicl_py.pypy3] 427 ns +- 12 ns: 1.46x slower (+46%)
ctor: Mean +- std dev: [atomic.pypy3] 270 ns +- 10 ns -> [atomicl_py.pypy3] 390 ns +- 10 ns: 1.44x slower (+44%)
increment: Mean +- std dev: [atomic.pypy3] 27.9 ns +- 0.4 ns -> [atomicl_py.pypy3] 274 ns +- 2 ns: 9.82x slower (+882%)
decrement: Mean +- std dev: [atomic.pypy3] 27.7 ns +- 0.1 ns -> [atomicl_py.pypy3] 283 ns +- 6 ns: 10.19x slower (+919%)
setter: Mean +- std dev: [atomic.pypy3] 283 ns +- 5 ns -> [atomicl_py.pypy3] 0.22 ns +- 0.00 ns: 1258.80x faster (-100%)
cas: Mean +- std dev: [atomic.pypy3] 289 ns +- 6 ns -> [atomicl_py.pypy3] 268 ns +- 3 ns: 1.08x faster (-7%)
License
-------
MIT
.. _AtomicLong: https://docs.oracle.com/javase/9/docs/api/java/util/concurrent/atomic/AtomicLong.html
.. _atomic: https://github.com/cyberdelia/atomic
.. _Cython: http://cython.org
.. _CFFI: https://cffi.readthedocs.io
.. _benchmarks.py: https://github.com/gagoman/atomicl/blob/master/benchmarks.py
زبان مورد نیاز
| مقدار | نام |
|---|---|
| ~=3.4 | Python |
نحوه نصب
نصب پکیج whl atomicl-0.1.1:
pip install atomicl-0.1.1.whl
نصب پکیج tar.gz atomicl-0.1.1:
pip install atomicl-0.1.1.tar.gz