An Explanation of Splaying

نویسنده

Ashok Subramanian

چکیده

Just as in bottom-up splaying, the idea is to follow each access by a restructuring of the search tree along the path from the accessed item to the root of the tree. The restructuring is done in a local fashion, i.e., without using information about the global structure of the tree. We call the restructuring algorithm the super̈ isor; it operates with a set of rules called the ruleset. Each unit of restructuring happens in the vicinity of the cursor, a distinguished location in the search tree. Initially the supervisor places the cursor at the location of the item that has just been accessed. It then repeatedly picks an applicable rule from the ruleset and applies it. Each rule application moves the cursor toward the root of the search tree. Eventually the cursor reaches the root of the search tree, and the supervisor halts.

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