AvlTree.Clear (gb.data)
Sub Clear ( )
Clear the tree, i.e. remove all elements. This is
way faster than
removing every element by assigning Null to it like this:
For Each v In hTree
hTree[hTree.Key] = Null
Next
Because removing an element may require to rebalance the tree at most
hTree.Height times. For each element, this is a great overhead to have an
empty tree.
So use hTree.Clear() if the tree shall be emptied.