upstream/mercurial-mirror Files · mercurial/repo.py

bdiff: gradually enable the popularity hack...

bdiff: gradually enable the popularity hack Patch from Jason Orendorff The lower the threshold, the stronger the popularity hack's influence. So at 3999 lines, the hack is disabled; and at 4000 lines, the hack is enabled at maximum strength (t=4). No source file in mercurial/crew is over 4000 lines. But there are, oh, a few such files in Mozilla. I can testify that this hack causes hg to generate some correct but eyebrow-raising patches. I think the hack should phase in gradually. The threshold should be high for small files where we don't need it so much. Like this: t = (bn < 31000) ? 1000000 / bn : bn / 1000; That would leave the popularity hack disabled for small files, then gradually phase it in: bn < 1000 -- t > bn (popularity hack is completely disabled) bn == 1000 -- t = 1000 (still effectively disabled) bn == 2000 -- t = 500 (only hits unusual files) bn == 10000 -- t = 100 (only hits especially common lines) bn == 31000 -- t = 31 (hack is at maximum power) bn == 32000 -- t = 32 (hack could backfire, ease off)

Andrey Somov - - Load All Authors

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      # repo.py - repository base classes for mercurial

      #

      # Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>

      # Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>

      #

      # This software may be used and distributed according to the terms of the

      # GNU General Public License version 2, incorporated herein by reference.

      from i18n import _

      import error

      class repository(object):

          def capable(self, name):

              '''tell whether repo supports named capability.

              return False if not supported.

              if boolean capability, return True.

              if string capability, return string.'''

              if name in self.capabilities:

                  return True

              name_eq = name + '='

              for cap in self.capabilities:

                  if cap.startswith(name_eq):

                      return cap[len(name_eq):]

              return False

          def requirecap(self, name, purpose):

              '''raise an exception if the given capability is not present'''

              if not self.capable(name):

                  raise error.CapabilityError(

                      _('cannot %s; remote repository does not '

                        'support the %r capability') % (purpose, name))

          def local(self):

              return False

          def cancopy(self):

              return self.local()

          def rjoin(self, path):

              url = self.url()

              if url.endswith('/'):

                  return url + path

              else:

                  return url + '/' + path

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				# repo.py - repository base classes for mercurial
				#
				# Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>
				# Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
				#
				# This software may be used and distributed according to the terms of the
				# GNU General Public License version 2, incorporated herein by reference.

				from i18n import _
				import error

				class repository(object):
				def capable(self, name):
				'''tell whether repo supports named capability.
				return False if not supported.
				if boolean capability, return True.
				if string capability, return string.'''
				if name in self.capabilities:
				return True
				name_eq = name + '='
				for cap in self.capabilities:
				if cap.startswith(name_eq):
				return cap[len(name_eq):]
				return False

				def requirecap(self, name, purpose):
				'''raise an exception if the given capability is not present'''
				if not self.capable(name):
				raise error.CapabilityError(
				_('cannot %s; remote repository does not '
				'support the %r capability') % (purpose, name))

				def local(self):
				return False

				def cancopy(self):
				return self.local()

				def rjoin(self, path):
				url = self.url()
				if url.endswith('/'):
				return url + path
				else:
				return url + '/' + path