280         self._pcache = {}

   280         self._pcache = {}

   281         # Mapping of revision integer to full node.

   281         # Mapping of revision integer to full node.

   282         self._nodecache = {nullid: nullrev}

   282         self._nodecache = {nullid: nullrev}

   283         self._nodepos = None

   283         self._nodepos = None

   284         self._compengine = 'zlib'

   284         self._compengine = 'zlib'

   285 

   286 

   286         v = REVLOG_DEFAULT_VERSION

   287         v = REVLOG_DEFAULT_VERSION

   287         opts = getattr(opener, 'options', None)

   288         opts = getattr(opener, 'options', None)

   288         if opts is not None:

   289         if opts is not None:

   289             if 'revlogv1' in opts:

   290             if 'revlogv1' in opts:

   298             if 'aggressivemergedeltas' in opts:

   299             if 'aggressivemergedeltas' in opts:

   299                 self._aggressivemergedeltas = opts['aggressivemergedeltas']

   300                 self._aggressivemergedeltas = opts['aggressivemergedeltas']

   300             self._lazydeltabase = bool(opts.get('lazydeltabase', False))

   301             self._lazydeltabase = bool(opts.get('lazydeltabase', False))

   301             if 'compengine' in opts:

   302             if 'compengine' in opts:

   302                 self._compengine = opts['compengine']

   303                 self._compengine = opts['compengine']

   303 

   306 

   304         if self._chunkcachesize <= 0:

   307         if self._chunkcachesize <= 0:

   305             raise RevlogError(_('revlog chunk cache size %r is not greater '

   308             raise RevlogError(_('revlog chunk cache size %r is not greater '

   306                                 'than 0') % self._chunkcachesize)

   309                                 'than 0') % self._chunkcachesize)

   307         elif self._chunkcachesize & (self._chunkcachesize - 1):

   310         elif self._chunkcachesize & (self._chunkcachesize - 1):

  1594         # - 'dist' is the distance from the base revision -- bounding it limits

  1597         # - 'dist' is the distance from the base revision -- bounding it limits

  1595         #   the amount of I/O we need to do.

  1598         #   the amount of I/O we need to do.

  1596         # - 'compresseddeltalen' is the sum of the total size of deltas we need

  1599         # - 'compresseddeltalen' is the sum of the total size of deltas we need

  1597         #   to apply -- bounding it limits the amount of CPU we consume.

  1600         #   to apply -- bounding it limits the amount of CPU we consume.

  1598         dist, l, data, base, chainbase, chainlen, compresseddeltalen = d

  1601         dist, l, data, base, chainbase, chainlen, compresseddeltalen = d

  1600             compresseddeltalen > textlen * 2 or

  1609             compresseddeltalen > textlen * 2 or

  1601             (self._maxchainlen and chainlen > self._maxchainlen)):

  1610             (self._maxchainlen and chainlen > self._maxchainlen)):

  1602             return False

  1611             return False

  1603 

  1612 

  1604         return True

  1613         return True