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used to write into the frames local dictionary!!) Derived classes
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[ 0] = Time that needs to be charged to the parent frame's function.
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subfunctions (this latter is tallied in cur[2]).
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[-3] = Name of the function that corresponds to this frame.
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self.timings[]. The index is always the name stored in self.cur[-3].
The following are the definitions of the members:
[0] = The number of times this function was called, not counting direct
or indirect recursion,
[1] = Number of times this function appears on the stack, minus one
[2] = Total time spent internal to this function
[3] = Cumulative time that this function was present on the stack. In
non-recursive functions, this is the total execution time from start
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all subfunctions.
[4] = A dictionary indicating for each function name, the number of times
it was called by us.
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