upstream/mercurial-mirror Files · contrib/memory.py

phases: avoid N² behavior in `advanceboundary`...

phases: avoid N² behavior in `advanceboundary` We allowed duplicated entries in the deque, which each entry could potentially insert all its ancestors. So advancing boundary for the full repository would mean each revision would walk all its ancestors, resulting in O(N²) iteration. For repository of any decent size, N² is quickly insane. We introduce a simple set to avoid this and get back to reasonable performance.

Gregory Szorc - - Load All Authors

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      # memory.py - track memory usage

      #

      # Copyright 2009 Olivia Mackall <olivia@selenic.com> and others

      #

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

      # GNU General Public License version 2 or any later version.

      '''helper extension to measure memory usage

      Reads current and peak memory usage from ``/proc/self/status`` and

      prints it to ``stderr`` on exit.

      '''

      def memusage(ui):

          """Report memory usage of the current process."""

          result = {'peak': 0, 'rss': 0}

          with open('/proc/self/status', 'r') as status:

              # This will only work on systems with a /proc file system

              # (like Linux).

              for line in status:

                  parts = line.split()

                  key = parts[0][2:-1].lower()

                  if key in result:

                      result[key] = int(parts[1])

          ui.write_err(

              ", ".join(

                  ["%s: %.1f MiB" % (k, v / 1024.0) for k, v in result.iteritems()]

              )

              + "\n"

          )

      def extsetup(ui):

          ui.atexit(memusage, ui)

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				# memory.py - track memory usage
				#
				# Copyright 2009 Olivia Mackall <olivia@selenic.com> and others
				#
				# This software may be used and distributed according to the terms of the
				# GNU General Public License version 2 or any later version.

				'''helper extension to measure memory usage

				Reads current and peak memory usage from ``/proc/self/status`` and
				prints it to ``stderr`` on exit.
				'''


				def memusage(ui):
				"""Report memory usage of the current process."""
				result = {'peak': 0, 'rss': 0}
				with open('/proc/self/status', 'r') as status:
				# This will only work on systems with a /proc file system
				# (like Linux).
				for line in status:
				parts = line.split()
				key = parts[0][2:-1].lower()
				if key in result:
				result[key] = int(parts[1])
				ui.write_err(
				", ".join(
				["%s: %.1f MiB" % (k, v / 1024.0) for k, v in result.iteritems()]
				)
				+ "\n"
				)


				def extsetup(ui):
				ui.atexit(memusage, ui)