upstream/mercurial-mirror Files · contrib/python-zstandard/setup.py

bundle2: implement consume() API on unbundlepart...

bundle2: implement consume() API on unbundlepart We want bundle parts to not be seekable by default. That means eliminating the generic seek() method. A common pattern in bundle2.py is to seek to the end of the part data. This is mainly used by the part iteration code to ensure the underlying stream is advanced to the next bundle part. In this commit, we establish a dedicated API for consuming a bundle2 part data. We switch users of seek() to it. The old implementation of seek(0, os.SEEK_END) would effectively call self.read(). The new implementation calls self.read(32768) in a loop. The old implementation would therefore assemble a buffer to hold all remaining data being seeked over. For seeking over large bundle parts, this would involve a large allocation and a lot of overhead to collect intermediate data! This overhead can be seen in the results for `hg perfbundleread`: ! bundle2 iterparts() ! wall 10.891305 comb 10.820000 user 7.990000 sys 2.830000 (best of 3) ! wall 8.070791 comb 8.060000 user 7.180000 sys 0.880000 (best of 3) ! bundle2 part seek() ! wall 12.991478 comb 10.390000 user 7.720000 sys 2.670000 (best of 3) ! wall 10.370142 comb 10.350000 user 7.430000 sys 2.920000 (best of 3) Of course, skipping over large payload data isn't likely very common. So I doubt the performance wins will be observed in the wild. Differential Revision: https://phab.mercurial-scm.org/D1388

Gregory Szorc - - Load All Authors

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      #!/usr/bin/env python

      # Copyright (c) 2016-present, Gregory Szorc

      # All rights reserved.

      #

      # This software may be modified and distributed under the terms

      # of the BSD license. See the LICENSE file for details.

      import sys

      from setuptools import setup

      try:

          import cffi

      except ImportError:

          cffi = None

      import setup_zstd

      SUPPORT_LEGACY = False

      if "--legacy" in sys.argv:

          SUPPORT_LEGACY = True

          sys.argv.remove("--legacy")

      # Code for obtaining the Extension instance is in its own module to

      # facilitate reuse in other projects.

      extensions = [setup_zstd.get_c_extension(SUPPORT_LEGACY, 'zstd')]

      install_requires = []

      if cffi:

          import make_cffi

          extensions.append(make_cffi.ffi.distutils_extension())

          # Need change in 1.8 for ffi.from_buffer() behavior.

          install_requires.append('cffi>=1.8')

      version = None

      with open('c-ext/python-zstandard.h', 'r') as fh:

          for line in fh:

              if not line.startswith('#define PYTHON_ZSTANDARD_VERSION'):

                  continue

              version = line.split()[2][1:-1]

              break

      if not version:

          raise Exception('could not resolve package version; '

                          'this should never happen')

      setup(

          name='zstandard',

          version=version,

          description='Zstandard bindings for Python',

          long_description=open('README.rst', 'r').read(),

          url='https://github.com/indygreg/python-zstandard',

          author='Gregory Szorc',

          author_email='gregory.szorc@gmail.com',

          license='BSD',

          classifiers=[

              'Development Status :: 4 - Beta',

              'Intended Audience :: Developers',

              'License :: OSI Approved :: BSD License',

              'Programming Language :: C',

              'Programming Language :: Python :: 2.6',

              'Programming Language :: Python :: 2.7',

              'Programming Language :: Python :: 3.3',

              'Programming Language :: Python :: 3.4',

              'Programming Language :: Python :: 3.5',

              'Programming Language :: Python :: 3.6',

          ],

          keywords='zstandard zstd compression',

          ext_modules=extensions,

          test_suite='tests',

          install_requires=install_requires,

      )

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				#!/usr/bin/env python
				# Copyright (c) 2016-present, Gregory Szorc
				# All rights reserved.
				#
				# This software may be modified and distributed under the terms
				# of the BSD license. See the LICENSE file for details.

				import sys
				from setuptools import setup

				try:
				import cffi
				except ImportError:
				cffi = None

				import setup_zstd

				SUPPORT_LEGACY = False

				if "--legacy" in sys.argv:
				SUPPORT_LEGACY = True
				sys.argv.remove("--legacy")

				# Code for obtaining the Extension instance is in its own module to
				# facilitate reuse in other projects.
				extensions = [setup_zstd.get_c_extension(SUPPORT_LEGACY, 'zstd')]

				install_requires = []

				if cffi:
				import make_cffi
				extensions.append(make_cffi.ffi.distutils_extension())

				# Need change in 1.8 for ffi.from_buffer() behavior.
				install_requires.append('cffi>=1.8')

				version = None

				with open('c-ext/python-zstandard.h', 'r') as fh:
				for line in fh:
				if not line.startswith('#define PYTHON_ZSTANDARD_VERSION'):
				continue

				version = line.split()[2][1:-1]
				break

				if not version:
				raise Exception('could not resolve package version; '
				'this should never happen')

				setup(
				name='zstandard',
				version=version,
				description='Zstandard bindings for Python',
				long_description=open('README.rst', 'r').read(),
				url='https://github.com/indygreg/python-zstandard',
				author='Gregory Szorc',
				author_email='gregory.szorc@gmail.com',
				license='BSD',
				classifiers=[
				'Development Status :: 4 - Beta',
				'Intended Audience :: Developers',
				'License :: OSI Approved :: BSD License',
				'Programming Language :: C',
				'Programming Language :: Python :: 2.6',
				'Programming Language :: Python :: 2.7',
				'Programming Language :: Python :: 3.3',
				'Programming Language :: Python :: 3.4',
				'Programming Language :: Python :: 3.5',
				'Programming Language :: Python :: 3.6',
				],
				keywords='zstandard zstd compression',
				ext_modules=extensions,
				test_suite='tests',
				install_requires=install_requires,
				)