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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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      # shallowstore.py - shallow store for interacting with shallow repos

      #

      # Copyright 2013 Facebook, Inc.

      #

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

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

      def wrapstore(store):

          class shallowstore(store.__class__):

              def __contains__(self, path):

                  # Assume it exists

                  return True

          store.__class__ = shallowstore

          return store

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				# shallowstore.py - shallow store for interacting with shallow repos
				#
				# Copyright 2013 Facebook, Inc.
				#
				# This software may be used and distributed according to the terms of the
				# GNU General Public License version 2 or any later version.


				def wrapstore(store):
				class shallowstore(store.__class__):
				def __contains__(self, path):
				# Assume it exists
				return True

				store.__class__ = shallowstore

				return store