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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.

Matt Harbison - - Load All Authors

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      from typing import (

          AnyStr,

          IO,

          List,

          Optional,

          Sequence,

      )

      version: int

      class stat:

          st_dev: int

          st_mode: int

          st_nlink: int

          st_size: int

          st_mtime: int

          st_ctime: int

      def listdir(path: bytes, st: bool, skip: Optional[bool]) -> List[stat]: ...

      def posixfile(name: AnyStr, mode: bytes, buffering: int) -> IO: ...

      def statfiles(names: Sequence[bytes]) -> List[stat]: ...

      def setprocname(name: bytes) -> None: ...

      def getfstype(path: bytes) -> bytes: ...

      def getfsmountpoint(path: bytes) -> bytes: ...

      def unblocksignal(sig: int) -> None: ...

      def isgui() -> bool: ...

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				from typing import (
				AnyStr,
				IO,
				List,
				Optional,
				Sequence,
				)

				version: int

				class stat:
				st_dev: int
				st_mode: int
				st_nlink: int
				st_size: int
				st_mtime: int
				st_ctime: int

				def listdir(path: bytes, st: bool, skip: Optional[bool]) -> List[stat]: ...
				def posixfile(name: AnyStr, mode: bytes, buffering: int) -> IO: ...
				def statfiles(names: Sequence[bytes]) -> List[stat]: ...
				def setprocname(name: bytes) -> None: ...
				def getfstype(path: bytes) -> bytes: ...
				def getfsmountpoint(path: bytes) -> bytes: ...
				def unblocksignal(sig: int) -> None: ...
				def isgui() -> bool: ...