upstream/mercurial-mirror Files · mercurial/thirdparty/zope/interface/_flatten.py

nodemap: also use persistent nodemap for manifest...

nodemap: also use persistent nodemap for manifest The manifest as a different usage pattern than the changelog. First, while the lookup in changelog are not garanteed to match, the lookup in the manifest nodemap come from changelog and will exist in the manifest. In addition, looking up a manifest almost always result in unpacking a manifest an operation that rarely come cheap. Nevertheless, using a persistent nodemap provide a significant gain for some operations. For our measurementw, we use `hg cat --rev REV FILE` on the our reference mozilla-try. On this repository the persistent nodemap cache is about 29 MB in side for a total store side of 11,988 MB File with large history (file: b2g/config/gaia.json, revision: 195a1146daa0) no optimisation: 0.358s using mmap for index: 0.297s (-0.061s) persistent nodemap for changelog only: 0.275s (-0.024s) persistent nodemap for manifest too: 0.258s (-0.017s) File with small history (file: .hgignore, revision: 195a1146daa0) no optimisation: 0.377s using mmap for index: 0.296s (-0.061s) persistent nodemap for changelog only: 0.274s (-0.022s) persistent nodemap for manifest too: 0.257s (-0.017s) Same file but using a revision (8ba995b74e18) with a smaller manifest (3944829 bytes vs 10 bytes) no optimisation: 0.192s (-0.185s) using mmap for index: 0.131s (-0.061s) persistent nodemap for changelog only: 0.106s (-0.025s) persistent nodemap for manifest too: 0.087s (-0.019s) Differential Revision: https://phab.mercurial-scm.org/D8410

Gregory Szorc - - Load All Authors

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      ##############################################################################

      #

      # Copyright (c) 2002 Zope Foundation and Contributors.

      # All Rights Reserved.

      #

      # This software is subject to the provisions of the Zope Public License,

      # Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.

      # THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED

      # WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

      # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS

      # FOR A PARTICULAR PURPOSE.

      #

      ##############################################################################

      """Adapter-style interface registry

      See Adapter class.

      """

      from __future__ import absolute_import

      from .interface import Declaration

      def _flatten(implements, include_None=0):

          try:

              r = implements.flattened()

          except AttributeError:

              if implements is None:

                  r=()

              else:

                  r = Declaration(implements).flattened()

          if not include_None:

              return r

          r = list(r)

          r.append(None)

          return r

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				##############################################################################
				#
				# Copyright (c) 2002 Zope Foundation and Contributors.
				# All Rights Reserved.
				#
				# This software is subject to the provisions of the Zope Public License,
				# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
				# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
				# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
				# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
				# FOR A PARTICULAR PURPOSE.
				#
				##############################################################################
				"""Adapter-style interface registry

				See Adapter class.
				"""

				from __future__ import absolute_import

				from .interface import Declaration

				def _flatten(implements, include_None=0):

				try:
				r = implements.flattened()
				except AttributeError:
				if implements is None:
				r=()
				else:
				r = Declaration(implements).flattened()

				if not include_None:
				return r

				r = list(r)
				r.append(None)
				return r