The Amortized Analysis of a Non-blocking Chromatic Tree

Jeremy Ko

A non-blocking chromatic tree is a type of balanced binary search tree where multiple processes can concurrently perform search and update operations. We prove that a certain implementation has amortized cost $O(\dot{c} + \log n)$ for each operation, where $\dot{c}$ is the maximum number of concurrent operations during the execution and $n$ is the maximum number of keys in the tree during the operation. This amortized analysis presents new challenges compared to existing analyses of other non-blocking data structures.

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