82     def diff_diff(self, other):  argument
84         old = other.x if other else 0
93     def ratio(self, other):  argument
95         old = other.x if other else 0
109     def __add__(self, other):  argument
110         return self.__class__(self.x + other.x)
112     def __sub__(self, other):  argument
113         return self.__class__(self.x - other.x)
115     def __mul__(self, other):  argument
116         return self.__class__(self.x * other.x)
139     def __add__(self, other):  argument
141             self.cycles + other.cycles,
142             self.bmisses + other.bmisses,
143             self.branches + other.branches,
144             self.cmisses + other.cmisses,
145             self.caches + other.caches,
146             self.children + other.children)