This view is a powerful tool for examining how memory is distributed among instances of different classes.
Information for a class is shown in four columns: "Name", "Objects" (number of objects), "Shallow Size" and "Retained Size" (for details please see Shallow and retained sizes).
With the help of "Class list" you can find classes whose objects retain most memory in one click. Use the balloon above the "Retained Size" column to start calculation.
After calculation completes, the classes will be sorted by retained size in descending order.
You can narrow down the list by typing a class name in the text field.
Please also consider Memory | Instances by Class... (Ctrl+N),
which opens all instances of a class by its name.